Mark classes as final that can be marked as final.

Mac/AppDelegate.swift

@@ -22,7 +22,7 @@ import Sparkle
 var appDelegate: AppDelegate!
 
 @NSApplicationMain
-class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations, UNUserNotificationCenterDelegate, UnreadCountProvider, SPUStandardUserDriverDelegate, SPUUpdaterDelegate {
+final class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations, UNUserNotificationCenterDelegate, UnreadCountProvider, SPUStandardUserDriverDelegate, SPUUpdaterDelegate {
 
 	private struct WindowRestorationIdentifiers {
 		static let mainWindow = "mainWindow"

Mac/MainWindow/AddFeed/AddFeedController.swift

@@ -22,7 +22,7 @@ import Parser
 //   Else,
 //      display error sheet.
 
-class AddFeedController: AddFeedWindowControllerDelegate {
+final class AddFeedController: AddFeedWindowControllerDelegate {
 
 	private let hostWindow: NSWindow
 	private var addFeedWindowController: AddFeedWindowController?

Mac/MainWindow/AddFeed/FolderTreeMenu.swift

@@ -11,7 +11,7 @@ import RSCore
 import RSTree
 import Account
 
-class FolderTreeMenu {
+final class FolderTreeMenu {
 
 	static func createFolderPopupMenu(with rootNode: Node, restrictToSpecialAccounts: Bool = false) -> NSMenu {
 

Mac/MainWindow/AddFolder/AddFolderWindowController.swift

@@ -10,7 +10,7 @@ import AppKit
 import Articles
 import Account
 
-class AddFolderWindowController: NSWindowController {
+final class AddFolderWindowController: NSWindowController {
 
     @IBOutlet var folderNameTextField: NSTextField!
     @IBOutlet var accountPopupButton: NSPopUpButton!

Mac/MainWindow/ArticleExtractorButton.swift

@@ -15,7 +15,7 @@ enum ArticleExtractorButtonState {
 	case off
 }
 
-class ArticleExtractorButton: NSButton {
+final class ArticleExtractorButton: NSButton {
 
 	private var animatedLayer: CALayer?
 

Mac/MainWindow/LegacyArticleExtractorButton.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-class LegacyArticleExtractorButton: NSButton {
+final class LegacyArticleExtractorButton: NSButton {
 
 	var isError = false {
 		didSet {

Mac/MainWindow/MainWindowController.swift

@@ -16,7 +16,7 @@ enum TimelineSourceMode {
 	case regular, search
 }
 
-class MainWindowController: NSWindowController, NSUserInterfaceValidations {
+final class MainWindowController: NSWindowController, NSUserInterfaceValidations {
 
     @IBOutlet weak var articleThemePopUpButton: NSPopUpButton?
 

Mac/MainWindow/OPML/ExportOPMLWindowController.swift

@@ -10,7 +10,7 @@ import AppKit
 import Account
 import UniformTypeIdentifiers
 
-class ExportOPMLWindowController: NSWindowController {
+final class ExportOPMLWindowController: NSWindowController {
 
 	@IBOutlet weak var accountPopUpButton: NSPopUpButton!
 	private weak var hostWindow: NSWindow?

Mac/MainWindow/OPML/ImportOPMLWindowController.swift

@@ -10,7 +10,7 @@ import AppKit
 import Account
 import UniformTypeIdentifiers
 
-class ImportOPMLWindowController: NSWindowController {
+final class ImportOPMLWindowController: NSWindowController {
 
 	@IBOutlet weak var accountPopUpButton: NSPopUpButton!
 	private weak var hostWindow: NSWindow?

Mac/MainWindow/Sidebar/Cell/SidebarCell.swift

@@ -11,7 +11,7 @@ import RSCore
 import Account
 import RSTree
 
-class SidebarCell: NSTableCellView {
+final class SidebarCell: NSTableCellView {
 
 	var iconImage: IconImage? {
 		didSet {

Mac/MainWindow/Sidebar/SidebarOutlineView.swift

@@ -10,7 +10,7 @@ import AppKit
 import RSCore
 import RSTree
 
-class SidebarOutlineView: NSOutlineView {
+final class SidebarOutlineView: NSOutlineView {
 
 	@IBOutlet var keyboardDelegate: KeyboardDelegate!
 

Mac/MainWindow/Sidebar/SidebarViewController.swift

@@ -22,7 +22,7 @@ protocol SidebarDelegate: AnyObject {
 	func sidebarInvalidatedRestorationState(_: SidebarViewController)
 }
 
-@objc class SidebarViewController: NSViewController, NSOutlineViewDelegate, NSMenuDelegate, UndoableCommandRunner {
+@objc final class SidebarViewController: NSViewController, NSOutlineViewDelegate, NSMenuDelegate, UndoableCommandRunner {
 
 	@IBOutlet weak var outlineView: NSOutlineView!
 

Mac/MainWindow/Sidebar/UnreadCountView.swift

@@ -8,7 +8,7 @@
 
 import AppKit
 
-class UnreadCountView: NSView {
+final class UnreadCountView: NSView {
 
 	struct Appearance {
 		static let padding = NSEdgeInsets(top: 1.0, left: 7.0, bottom: 1.0, right: 7.0)

Mac/MainWindow/Timeline/Cell/TimelineTableCellView.swift

@@ -9,7 +9,7 @@
 import AppKit
 import RSCore
 
-class TimelineTableCellView: NSTableCellView {
+final class TimelineTableCellView: NSTableCellView {
 
 	private let titleView = TimelineTableCellView.multiLineTextField()
 	private let summaryView = TimelineTableCellView.multiLineTextField()

Mac/MainWindow/Timeline/Cell/UnreadIndicatorView.swift

@@ -8,7 +8,7 @@
 
 import AppKit
 
-class UnreadIndicatorView: NSView {
+final class UnreadIndicatorView: NSView {
 
 	static let unreadCircleDimension: CGFloat = 8.0
 

Mac/MainWindow/Timeline/TimelineTableRowView.swift

@@ -8,7 +8,7 @@
 
 import AppKit
 
-class TimelineTableRowView: NSTableRowView {
+final class TimelineTableRowView: NSTableRowView {
 
 	private var separator: NSView?
 

Mac/MainWindow/Timeline/TimelineTableView.swift

@@ -9,7 +9,7 @@
 import AppKit
 import RSCore
 
-class TimelineTableView: NSTableView {
+final class TimelineTableView: NSTableView {
 
 	weak var keyboardDelegate: KeyboardDelegate?
 

Mac/Preferences/Accounts/AccountCell.swift

@@ -8,7 +8,7 @@
 
 import AppKit
 
-class AccountCell: NSTableCellView {
+final class AccountCell: NSTableCellView {
 
 	private var originalImage: NSImage?
 

Mac/Preferences/Accounts/AccountsAddCloudKitWindowController.swift

@@ -17,7 +17,7 @@ enum AccountsAddCloudKitWindowControllerError: LocalizedError {
 	}
 }
 
-class AccountsAddCloudKitWindowController: NSWindowController {
+final class AccountsAddCloudKitWindowController: NSWindowController {
 
 	@IBOutlet weak var limitationsAndSolutionsTextField: NSTextField!
 

Mac/Preferences/Accounts/AccountsAddLocalWindowController.swift

@@ -9,7 +9,7 @@
 import AppKit
 import Account
 
-class AccountsAddLocalWindowController: NSWindowController {
+final class AccountsAddLocalWindowController: NSWindowController {
 
 	@IBOutlet private weak var nameTextField: NSTextField!
 	@IBOutlet private weak var localAccountNameTextField: NSTextField!

Mac/Preferences/Accounts/AccountsFeedbinWindowController.swift

@@ -11,7 +11,7 @@ import Account
 import RSWeb
 import Secrets
 
-class AccountsFeedbinWindowController: NSWindowController {
+final class AccountsFeedbinWindowController: NSWindowController {
 
 	@IBOutlet weak var signInTextField: NSTextField!
 	@IBOutlet weak var noAccountTextField: NSTextField!

Mac/Preferences/Accounts/AccountsNewsBlurWindowController.swift

@@ -11,7 +11,7 @@ import Account
 import RSWeb
 import Secrets
 
-class AccountsNewsBlurWindowController: NSWindowController {
+final class AccountsNewsBlurWindowController: NSWindowController {
 
 	@IBOutlet weak var signInTextField: NSTextField!
 	@IBOutlet weak var noAccountTextField: NSTextField!

Mac/Preferences/Accounts/AccountsReaderAPIWindowController.swift

@@ -11,7 +11,7 @@ import Account
 import RSWeb
 import Secrets
 
-class AccountsReaderAPIWindowController: NSWindowController {
+final class AccountsReaderAPIWindowController: NSWindowController {
 
 	@IBOutlet weak var titleImageView: NSImageView!
 	@IBOutlet weak var titleLabel: NSTextField!

Mac/Preferences/PreferencesWindowController.swift

@@ -27,7 +27,7 @@ private struct ToolbarItemIdentifier {
 	static let Advanced = "Advanced"
 }
 
-class PreferencesWindowController: NSWindowController, NSToolbarDelegate {
+final class PreferencesWindowController: NSWindowController, NSToolbarDelegate {
 
 	private let windowWidth = CGFloat(512.0) // Width is constant for all views; only the height changes
 	private var viewControllers = [String: NSViewController]()

Mac/SafariExtension/SafariExtensionHandler.swift

@@ -8,7 +8,7 @@
 
 import SafariServices
 
-class SafariExtensionHandler: SFSafariExtensionHandler {
+final class SafariExtensionHandler: SFSafariExtensionHandler {
 
 	// Safari App Extensions don't support any reasonable means of detecting whether a
 	// specific Safari page was loaded with the benefit of the extension's injected
@@ -20,7 +20,7 @@ class SafariExtensionHandler: SFSafariExtensionHandler {
 	// I tried to use a NSMapTable from String to the closure directly, but Swift
 	// complains that the object has to be a class type.
 	typealias ValidationHandler = (Bool, String) -> Void
-	class ValidationWrapper {
+	final class ValidationWrapper {
 		let validationHandler: ValidationHandler
 
 		init(validationHandler: @escaping ValidationHandler) {

Mac/SafariExtension/SafariExtensionViewController.swift

@@ -8,7 +8,7 @@
 
 import SafariServices
 
-class SafariExtensionViewController: SFSafariExtensionViewController {
+final class SafariExtensionViewController: SFSafariExtensionViewController {
 
 	// This would be the place to handle a popover that could, for example, list the possibly multiple feeds offered by a site.
     static let shared: SafariExtensionViewController = {

Mac/Scriptability/Account+Scriptability.swift

@@ -12,7 +12,7 @@ import Articles
 import RSCore
 
 @objc(ScriptableAccount)
-class ScriptableAccount: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
+final class ScriptableAccount: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
 
     let account: Account
     init (_ account: Account) {

Mac/Scriptability/AppDelegate+Scriptability.swift

@@ -90,7 +90,7 @@ extension AppDelegate: AppDelegateAppleEvents {
     }
 }
 
-class NetNewsWireCreateElementCommand: NSCreateCommand {
+final class NetNewsWireCreateElementCommand: NSCreateCommand {
     override func performDefaultImplementation() -> Any? {
          let classDescription = self.createClassDescription
          if classDescription.className == "feed" {
@@ -110,7 +110,7 @@ class NetNewsWireCreateElementCommand: NSCreateCommand {
     is ambiguity about whether specifiers are lists or single objects, the code switches
     based on which it is.
 */
-class NetNewsWireDeleteCommand: NSDeleteCommand {
+final class NetNewsWireDeleteCommand: NSDeleteCommand {
 
     /*
         delete(objectToDelete:, from container:)
@@ -165,7 +165,7 @@ class NetNewsWireDeleteCommand: NSDeleteCommand {
     }
 }
 
-class NetNewsWireExistsCommand: NSExistsCommand {
+final class NetNewsWireExistsCommand: NSExistsCommand {
 
     // cocoa default behavior doesn't work here, because of cases where we define an object's property
     // to be another object type.  e.g., 'permalink of the current article' parses as

Mac/Scriptability/Article+Scriptability.swift

@@ -11,7 +11,7 @@ import Account
 import Articles
 
 @objc(ScriptableArticle)
-class ScriptableArticle: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
+final class ScriptableArticle: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
 
     let article: Article
     let container: ScriptingObjectContainer

Mac/Scriptability/Author+Scriptability.swift

@@ -11,7 +11,7 @@ import Account
 import Articles
 
 @objc(ScriptableAuthor)
-class ScriptableAuthor: NSObject, UniqueIdScriptingObject {
+final class ScriptableAuthor: NSObject, UniqueIdScriptingObject {
 
     let author: Author
     let container: ScriptingObjectContainer

Mac/Scriptability/Folder+Scriptability.swift

@@ -12,7 +12,7 @@ import Articles
 import RSCore
 
 @objc(ScriptableFolder)
-class ScriptableFolder: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
+final class ScriptableFolder: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
 
     let folder: Folder
     let container: ScriptingObjectContainer

Mac/Scriptability/WebFeed+Scriptability.swift

@@ -12,7 +12,7 @@ import Account
 import Articles
 
 @objc(ScriptableFeed)
-class ScriptableFeed: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
+final class ScriptableFeed: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
 
     let feed: Feed
     let container: ScriptingObjectContainer

Mac/ShareExtension/ShareViewController.swift

@@ -10,7 +10,7 @@ import Cocoa
 import os.log
 import UniformTypeIdentifiers
 
-class ShareViewController: NSViewController {
+final class ShareViewController: NSViewController {
 
 	@IBOutlet weak var nameTextField: NSTextField!
 	@IBOutlet weak var folderPopUpButton: NSPopUpButton!

Modules/Account/Sources/Account/CloudKit/CloudKitAccountZoneDelegate.swift

@@ -13,7 +13,7 @@ import CloudKit
 import RSCore
 import Articles
 
-class CloudKitAcountZoneDelegate: CloudKitZoneDelegate {
+final class CloudKitAcountZoneDelegate: CloudKitZoneDelegate {
 
 	struct UnclaimedFeed {
 		let url: URL

Modules/Account/Sources/Account/CloudKit/CloudKitArticlesZoneDelegate.swift

@@ -16,7 +16,7 @@ import SyncDatabase
 import Articles
 import ArticlesDatabase
 
-class CloudKitArticlesZoneDelegate: CloudKitZoneDelegate {
+final class CloudKitArticlesZoneDelegate: CloudKitZoneDelegate {
 
 	private var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "CloudKit")
 

Modules/Account/Sources/Account/CloudKit/CloudKitReceiveStatusOperation.swift

@@ -10,7 +10,7 @@ import Foundation
 import os.log
 import RSCore
 
-class CloudKitReceiveStatusOperation: MainThreadOperation {
+final class CloudKitReceiveStatusOperation: MainThreadOperation {
 
 	private var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "CloudKit")
 

Modules/Account/Sources/Account/CloudKit/CloudKitRemoteNotificationOperation.swift

@@ -11,7 +11,7 @@ import Foundation
 import os.log
 import RSCore
 
-class CloudKitRemoteNotificationOperation: MainThreadOperation {
+final class CloudKitRemoteNotificationOperation: MainThreadOperation {
 
 	private var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "CloudKit")
 

Modules/Account/Sources/Account/CloudKit/CloudKitSendStatusOperation.swift

@@ -13,7 +13,7 @@ import RSCore
 import RSWeb
 import SyncDatabase
 
-class CloudKitSendStatusOperation: MainThreadOperation {
+final class CloudKitSendStatusOperation: MainThreadOperation {
 
 	private var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "CloudKit")
 	private let blockSize = 150

Modules/Account/Sources/Account/FeedFinder/FeedFinder.swift

@@ -11,7 +11,7 @@ import Parser
 import RSWeb
 import RSCore
 
-class FeedFinder {
+final class FeedFinder {
 
 	static func find(url: URL, completion: @escaping (Result<Set<FeedSpecifier>, Error>) -> Void) {
 		Downloader.shared.download(url) { (data, response, error) in

Modules/Account/Sources/Account/FeedFinder/HTMLFeedFinder.swift

@@ -11,7 +11,7 @@ import Parser
 
 private let feedURLWordsToMatch = ["feed", "xml", "rss", "atom", "json"]
 
-class HTMLFeedFinder {
+final class HTMLFeedFinder {
 
 	var feedSpecifiers: Set<FeedSpecifier> {
 		return Set(feedSpecifiersDictionary.values)

Modules/Account/Sources/Account/Feedly/Operations/FeedlyAddExistingFeedOperation.swift

@@ -12,7 +12,7 @@ import RSWeb
 import RSCore
 import Secrets
 
-class FeedlyAddExistingFeedOperation: FeedlyOperation, FeedlyOperationDelegate, FeedlyCheckpointOperationDelegate {
+final class FeedlyAddExistingFeedOperation: FeedlyOperation, FeedlyOperationDelegate, FeedlyCheckpointOperationDelegate {
 
 	private let operationQueue = MainThreadOperationQueue()
 	var addCompletionHandler: ((Result<Void, Error>) -> Void)?

Modules/Account/Sources/Account/Feedly/Operations/FeedlyAddNewFeedOperation.swift

@@ -13,7 +13,7 @@ import RSWeb
 import RSCore
 import Secrets
 
-class FeedlyAddNewFeedOperation: FeedlyOperation, FeedlyOperationDelegate, FeedlySearchOperationDelegate, FeedlyCheckpointOperationDelegate {
+final class FeedlyAddNewFeedOperation: FeedlyOperation, FeedlyOperationDelegate, FeedlySearchOperationDelegate, FeedlyCheckpointOperationDelegate {
 
 	private let operationQueue = MainThreadOperationQueue()
 	private let folder: Folder

Modules/Account/Sources/Account/Feedly/Operations/FeedlyDownloadArticlesOperation.swift

@@ -11,7 +11,7 @@ import os.log
 import RSCore
 import RSWeb
 
-class FeedlyDownloadArticlesOperation: FeedlyOperation {
+final class FeedlyDownloadArticlesOperation: FeedlyOperation {
 
 	private let account: Account
 	private let log: OSLog

Modules/Account/Sources/Account/Feedly/Operations/FeedlyGetUpdatedArticleIdsOperation.swift

@@ -14,7 +14,7 @@ import Secrets
 ///
 /// Typically, it pages through the article ids of the global.all stream.
 /// When all the article ids are collected, it is the responsibility of another operation to download them when appropriate.
-class FeedlyGetUpdatedArticleIdsOperation: FeedlyOperation, FeedlyEntryIdentifierProviding {
+final class FeedlyGetUpdatedArticleIdsOperation: FeedlyOperation, FeedlyEntryIdentifierProviding {
 
 	private let account: Account
 	private let resource: FeedlyResourceId

Modules/Account/Sources/Account/Feedly/Operations/FeedlyIngestStreamArticleIdsOperation.swift

@@ -15,7 +15,7 @@ import Secrets
 /// Typically, it pages through the article ids of the global.all stream.
 /// As the article ids are collected, a default read status is created for each.
 /// So this operation has side effects *for the entire account* it operates on.
-class FeedlyIngestStreamArticleIdsOperation: FeedlyOperation {
+final class FeedlyIngestStreamArticleIdsOperation: FeedlyOperation {
 
 	private let account: Account
 	private let resource: FeedlyResourceId

Modules/Account/Sources/Account/Feedly/Operations/FeedlySearchOperation.swift

@@ -18,7 +18,7 @@ protocol FeedlySearchOperationDelegate: AnyObject {
 
 /// Find one and only one feed for a given query (usually, a URL).
 /// What happens when a feed is found for the URL is delegated to the `searchDelegate`.
-class FeedlySearchOperation: FeedlyOperation {
+final class FeedlySearchOperation: FeedlyOperation {
 
 	let query: String
 	let locale: Locale

Modules/Account/Tests/AccountTests/AccountCredentialsTest.swift

@@ -11,7 +11,7 @@ import RSWeb
 @testable import Account
 import Secrets
 
-class AccountCredentialsTest: XCTestCase {
+final class AccountCredentialsTest: XCTestCase {
 
 	private var account: Account!
 

Modules/Account/Tests/AccountTests/Feedbin/AccountFeedbinFolderContentsSyncTest.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class AccountFeedbinFolderContentsSyncTest: XCTestCase {
+final class AccountFeedbinFolderContentsSyncTest: XCTestCase {
 
     override func setUp() {
     }

Modules/Account/Tests/AccountTests/Feedbin/AccountFeedbinFolderSyncTest.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class AccountFeedbinFolderSyncTest: XCTestCase {
+final class AccountFeedbinFolderSyncTest: XCTestCase {
 
     override func setUp() {
     }

Modules/Account/Tests/AccountTests/Feedbin/AccountFeedbinSyncTest.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class AccountFeedbinSyncTest: XCTestCase {
+final class AccountFeedbinSyncTest: XCTestCase {
 
     override func setUp() {
     }

Modules/Account/Tests/AccountTests/Feedly/FeedlyCheckpointOperationTests.swift

@@ -10,9 +10,9 @@ import XCTest
 @testable import Account
 import RSCore
 
-class FeedlyCheckpointOperationTests: XCTestCase {
+final class FeedlyCheckpointOperationTests: XCTestCase {
 
-	class TestDelegate: FeedlyCheckpointOperationDelegate {
+	final class TestDelegate: FeedlyCheckpointOperationDelegate {
 
 		var didReachCheckpointExpectation: XCTestExpectation?
 

Modules/Account/Tests/AccountTests/Feedly/FeedlyCollectionParserTests.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class FeedlyCollectionParserTests: XCTestCase {
+final class FeedlyCollectionParserTests: XCTestCase {
 
 	func testParsing() {
 		let collection = FeedlyCollection(feeds: [], label: "Test Collection", id: "test/collection/1")

Modules/Account/Tests/AccountTests/Feedly/FeedlyCreateFeedsForCollectionFoldersOperationTests.swift

@@ -10,7 +10,7 @@ import XCTest
 @testable import Account
 import RSCore
 
-class FeedlyCreateFeedsForCollectionFoldersOperationTests: XCTestCase {
+final class FeedlyCreateFeedsForCollectionFoldersOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()
@@ -27,7 +27,7 @@ class FeedlyCreateFeedsForCollectionFoldersOperationTests: XCTestCase {
 		super.tearDown()
 	}
 
-	class FeedsAndFoldersProvider: FeedlyFeedsAndFoldersProviding {
+	final class FeedsAndFoldersProvider: FeedlyFeedsAndFoldersProviding {
 		var feedsAndFolders = [([FeedlyFeed], Folder)]()
 	}
 

Modules/Account/Tests/AccountTests/Feedly/FeedlyEntryParserTests.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class FeedlyEntryParserTests: XCTestCase {
+final class FeedlyEntryParserTests: XCTestCase {
 
 	func testParsing() {
 		let content = FeedlyEntry.Content(content: "Test Content", direction: .leftToRight)

Modules/Account/Tests/AccountTests/Feedly/FeedlyFeedParserTests.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class FeedlyFeedParserTests: XCTestCase {
+final class FeedlyFeedParserTests: XCTestCase {
 
 	func testParsing() {
 		let name = "Test Feed"

Modules/Account/Tests/AccountTests/Feedly/FeedlyGetCollectionsOperationTests.swift

@@ -11,7 +11,7 @@ import XCTest
 import os.log
 import RSCore
 
-class FeedlyGetCollectionsOperationTests: XCTestCase {
+final class FeedlyGetCollectionsOperationTests: XCTestCase {
 
 	func testGetCollections() {
 		let support = FeedlyTestSupport()
@@ -58,7 +58,7 @@ class FeedlyGetCollectionsOperationTests: XCTestCase {
 
 	func testGetCollectionsError() {
 
-		class TestDelegate: FeedlyOperationDelegate {
+		final class TestDelegate: FeedlyOperationDelegate {
 			var errorExpectation: XCTestExpectation?
 			var error: Error?
 

Modules/Account/Tests/AccountTests/Feedly/FeedlyGetStreamContentsOperationTests.swift

@@ -10,7 +10,7 @@ import XCTest
 @testable import Account
 import RSCore
 
-class FeedlyGetStreamContentsOperationTests: XCTestCase {
+final class FeedlyGetStreamContentsOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()

Modules/Account/Tests/AccountTests/Feedly/FeedlyGetStreamIdsOperationTests.swift

@@ -10,7 +10,7 @@ import XCTest
 @testable import Account
 import RSCore
 
-class FeedlyGetStreamIdsOperationTests: XCTestCase {
+final class FeedlyGetStreamIdsOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()

Modules/Account/Tests/AccountTests/Feedly/FeedlyLogoutOperationTests.swift

@@ -11,7 +11,7 @@ import XCTest
 import RSCore
 import Secrets
 
-class FeedlyLogoutOperationTests: XCTestCase {
+final class FeedlyLogoutOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()
@@ -36,7 +36,7 @@ class FeedlyLogoutOperationTests: XCTestCase {
 		return (accessToken, refreshToken)
 	}
 
-	class TestFeedlyLogoutService: FeedlyLogoutService {
+	final class TestFeedlyLogoutService: FeedlyLogoutService {
 		var mockResult: Result<Void, Error>?
 		var logoutExpectation: XCTestExpectation?
 
@@ -123,7 +123,7 @@ class FeedlyLogoutOperationTests: XCTestCase {
 		}
 	}
 
-	class TestLogoutDelegate: FeedlyOperationDelegate {
+	final class TestLogoutDelegate: FeedlyOperationDelegate {
 		var error: Error?
 		var didFailExpectation: XCTestExpectation?
 

Modules/Account/Tests/AccountTests/Feedly/FeedlyMirrorCollectionsAsFoldersOperationTests.swift

@@ -10,7 +10,7 @@ import XCTest
 @testable import Account
 import RSCore
 
-class FeedlyMirrorCollectionsAsFoldersOperationTests: XCTestCase {
+final class FeedlyMirrorCollectionsAsFoldersOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()
@@ -27,7 +27,7 @@ class FeedlyMirrorCollectionsAsFoldersOperationTests: XCTestCase {
 		super.tearDown()
 	}
 
-	class CollectionsProvider: FeedlyCollectionProviding {
+	final class CollectionsProvider: FeedlyCollectionProviding {
 		var collections = [
 			FeedlyCollection(feeds: [], label: "One", id: "collections/1"),
 			FeedlyCollection(feeds: [], label: "Two", id: "collections/2")
@@ -105,7 +105,7 @@ class FeedlyMirrorCollectionsAsFoldersOperationTests: XCTestCase {
 		XCTAssertTrue(removeFolders.feedsAndFolders.isEmpty)
 	}
 
-	class CollectionsAndFeedsProvider: FeedlyCollectionProviding {
+	final class CollectionsAndFeedsProvider: FeedlyCollectionProviding {
 		var feedsForCollectionOne = [
 			FeedlyFeed(id: "feed/1", title: "Feed One", updated: nil, website: nil),
 			FeedlyFeed(id: "feed/2", title: "Feed Two", updated: nil, website: nil)

Modules/Account/Tests/AccountTests/Feedly/FeedlyOperationTests.swift

@@ -11,7 +11,7 @@ import XCTest
 import RSWeb
 import RSCore
 
-class FeedlyOperationTests: XCTestCase {
+final class FeedlyOperationTests: XCTestCase {
 
 	enum TestOperationError: Error, Equatable {
 		case mockError

Modules/Account/Tests/AccountTests/Feedly/FeedlyOrganiseParsedItemsByFeedOperationTests.swift

@@ -11,7 +11,7 @@ import XCTest
 import Parser
 import RSCore
 
-class FeedlyOrganiseParsedItemsByFeedOperationTests: XCTestCase {
+final class FeedlyOrganiseParsedItemsByFeedOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()

Modules/Account/Tests/AccountTests/Feedly/FeedlyRefreshAccessTokenOperationTests.swift

@@ -12,7 +12,7 @@ import RSWeb
 import RSCore
 import Secrets
 
-class FeedlyRefreshAccessTokenOperationTests: XCTestCase {
+final class FeedlyRefreshAccessTokenOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()
@@ -29,7 +29,7 @@ class FeedlyRefreshAccessTokenOperationTests: XCTestCase {
 		super.tearDown()
 	}
 
-	class TestRefreshTokenService: OAuthAccessTokenRefreshing {
+	final class TestRefreshTokenService: OAuthAccessTokenRefreshing {
 		var mockResult: Result<OAuthAuthorizationGrant, Error>?
 		var refreshAccessTokenExpectation: XCTestExpectation?
 		var parameterTester: ((String, OAuthAuthorizationClient) -> Void)?
@@ -71,7 +71,7 @@ class FeedlyRefreshAccessTokenOperationTests: XCTestCase {
 		XCTAssertTrue(refresh.isCanceled)
 	}
 
-	class TestRefreshTokenDelegate: FeedlyOperationDelegate {
+	final class TestRefreshTokenDelegate: FeedlyOperationDelegate {
 		var error: Error?
 		var didFailExpectation: XCTestExpectation?
 

Modules/Account/Tests/AccountTests/Feedly/FeedlyResourceIdTests.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class FeedlyResourceIdTests: XCTestCase {
+final class FeedlyResourceIdTests: XCTestCase {
 
 	func testFeedResourceId() {
 		let expectedUrl = "http://ranchero.com/blog/atom.xml"

Modules/Account/Tests/AccountTests/Feedly/FeedlySendArticleStatusesOperationTests.swift

@@ -12,7 +12,7 @@ import SyncDatabase
 import Articles
 import RSCore
 
-class FeedlySendArticleStatusesOperationTests: XCTestCase {
+final class FeedlySendArticleStatusesOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()

Modules/Account/Tests/AccountTests/Feedly/FeedlySyncAllMockResponseProvider.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-class FeedlyMockResponseProvider: TestTransportMockResponseProviding {
+final class FeedlyMockResponseProvider: TestTransportMockResponseProviding {
 
 	let subdirectory: String
 

Modules/Account/Tests/AccountTests/Feedly/FeedlySyncStreamContentsOperationTests.swift

@@ -10,7 +10,7 @@ import XCTest
 @testable import Account
 import RSCore
 
-class FeedlySyncStreamContentsOperationTests: XCTestCase {
+final class FeedlySyncStreamContentsOperationTests: XCTestCase {
 
 	private var account: Account!
 	private let support = FeedlyTestSupport()

Modules/Account/Tests/AccountTests/Feedly/FeedlyTestSupport.swift

@@ -13,7 +13,7 @@ import Secrets
 import os.log
 import SyncDatabase
 
-class FeedlyTestSupport {
+final class FeedlyTestSupport {
 	var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "FeedlyTests")
 	var accessToken = Credentials(type: .oauthAccessToken, username: "Test", secret: "t3st-access-tok3n")
 	var refreshToken = Credentials(type: .oauthRefreshToken, username: "Test", secret: "t3st-refresh-tok3n")
@@ -54,7 +54,7 @@ class FeedlyTestSupport {
 		return TestDatabaseContainer()
 	}
 
-	class TestDatabaseContainer {
+	final class TestDatabaseContainer {
 		private let path: String
 		private(set) var database: SyncDatabase!
 

Modules/Account/Tests/AccountTests/Feedly/FeedlyTextSanitizationTests.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class FeedlyTextSanitizationTests: XCTestCase {
+final class FeedlyTextSanitizationTests: XCTestCase {
 
 	func testRTLSanitization() {
 

Modules/Account/Tests/AccountTests/Feedly/TestMarkArticlesService.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import Account
 
-class TestMarkArticlesService: FeedlyMarkArticlesService {
+final class TestMarkArticlesService: FeedlyMarkArticlesService {
 
 	var didMarkExpectation: XCTestExpectation?
 	var parameterTester: ((Set<String>, FeedlyMarkAction) -> Void)?

Modules/Account/Tests/AccountTests/TestAccountManager.swift

@@ -11,7 +11,7 @@ import RSWeb
 
 @testable import Account
 
-class TestAccountManager {
+final class TestAccountManager {
 
 	static let shared = TestAccountManager()
 

Modules/RSCore/Sources/RSCore/AppKit/RSAppMovementMonitor.swift

@@ -9,7 +9,7 @@
 #if os(macOS)
 import Cocoa
 
-public class RSAppMovementMonitor: NSObject {
+public final class RSAppMovementMonitor: NSObject {
 
 	// If provided, the handler will be consulted when the app is moved.
 	// Return true to indicate that the default handler should be invoked.

Modules/RSCore/Sources/RSCore/AppKit/RSDarkModeAdaptingToolbarButton.swift

@@ -8,7 +8,7 @@
 #if os(macOS)
 import AppKit
 
-class RSDarkModeAdaptingToolbarButton: NSButton {
+final class RSDarkModeAdaptingToolbarButton: NSButton {
 	// Clients probably should not bother using this class unless they want
 	// to force the template in dark mode, but if you are using this in a more
 	// general context where you want to control and/or override it on a

Modules/RSCore/Sources/RSCore/AppKit/RSToolbarItem.swift

@@ -8,7 +8,7 @@
 #if os(macOS)
 import AppKit
 
-public class RSToolbarItem: NSToolbarItem {
+public final class RSToolbarItem: NSToolbarItem {
 
 	override public func validate() {
 

Modules/RSCore/Tests/RSCoreTests/MacroProcessorTests.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import RSCore
 
-class MacroProcessorTests: XCTestCase {
+final class MacroProcessorTests: XCTestCase {
 	let substitutions = ["one": "1", "two": "2"]
 
 	func testMacroProcessor() {

Modules/RSCore/Tests/RSCoreTests/MainThreadOperationTests.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import RSCore
 
-class MainThreadOperationTests: XCTestCase {
+final class MainThreadOperationTests: XCTestCase {
 
 	func testSingleOperation() {
 		let queue = MainThreadOperationQueue()

Modules/RSCore/Tests/RSCoreTests/String+RSCoreTests.swift

@@ -8,7 +8,7 @@
 
 import XCTest
 
-class StringRSCore: XCTestCase {
+final class StringRSCore: XCTestCase {
 
 	func testCollapsingWhitespace() {
 

Modules/RSWeb/Sources/RSWeb/Reachability.swift

@@ -33,7 +33,7 @@ public enum ReachabilityError: Error {
 	case unableToGetFlags(Int32)
 }
 
-public class Reachability {
+public final class Reachability {
 
 	/// Returns true if the internet is reachable.
 	///

Modules/RSWeb/Tests/RSWebTests/DictionaryTests.swift

@@ -8,7 +8,7 @@
 
 import XCTest
 
-class DictionaryTests: XCTestCase {
+final class DictionaryTests: XCTestCase {
 
 	func testSimpleQueryString() {
 

Modules/RSWeb/Tests/RSWebTests/RSWebTests.swift

@@ -9,7 +9,7 @@
 import XCTest
 @testable import RSWeb
 
-class RSWebTests: XCTestCase {
+final class RSWebTests: XCTestCase {
 
     func testExample() {
         // This is an example of a functional test case.

Modules/RSWeb/Tests/RSWebTests/StringTests.swift

@@ -8,7 +8,7 @@
 
 import XCTest
 
-class StringTests: XCTestCase {
+final class StringTests: XCTestCase {
 
     func testHTMLEscaping() {
 

Shared/Activity/ActivityManager.swift

@@ -15,7 +15,7 @@ import Articles
 import Intents
 import UniformTypeIdentifiers
 
-class ActivityManager {
+final class ActivityManager {
 
 	private var nextUnreadActivity: NSUserActivity?
 	private var selectingActivity: NSUserActivity?

Shared/ArticleExtractor/ArticleExtractor.swift

@@ -23,7 +23,7 @@ protocol ArticleExtractorDelegate: AnyObject {
     func articleExtractionDidComplete(extractedArticle: ExtractedArticle)
 }
 
-class ArticleExtractor {
+final class ArticleExtractor {
 
 	private var dataTask: URLSessionDataTask?
 

Shared/Extensions/RSImage-Extensions.swift

@@ -38,7 +38,7 @@ extension RSImage {
 
 // MARK: - IconScalerQueue
 
-private class IconScalerQueue {
+private final class IconScalerQueue {
 
 	static let shared = IconScalerQueue()
 

Shared/Favicons/ColorHash.swift

@@ -16,7 +16,7 @@ import WatchKit
 import AppKit
 #endif
 
-public class ColorHash {
+public final class ColorHash {
 
 	public static let defaultSaturation = [CGFloat(0.35), CGFloat(0.5), CGFloat(0.65)]
 	public static let defaultBrightness = [CGFloat(0.5), CGFloat(0.65), CGFloat(0.80)]

Shared/IconImageCache.swift

@@ -10,7 +10,7 @@ import Foundation
 import Account
 import Articles
 
-class IconImageCache {
+final class IconImageCache {
 
 	static var shared = IconImageCache()
 

Shared/Timer/ArticleStatusSyncTimer.swift

@@ -9,7 +9,7 @@
 import Foundation
 import Account
 
-class ArticleStatusSyncTimer {
+final class ArticleStatusSyncTimer {
 
 	private static let intervalSeconds = Double(120)
 

Tests/NetNewsWire-iOSTests/NetNewsWire-iOSTests.swift

@@ -8,7 +8,7 @@
 
 import XCTest
 
-class NetNewsWire-iOSTests: XCTestCase {
+final class NetNewsWire-iOSTests: XCTestCase {
 
     func testExample() {
         // This is an example of a functional test case.

Tests/NetNewsWireTests/ArticleSorterTests.swift

@@ -12,7 +12,7 @@ import XCTest
 
 @testable import NetNewsWire
 
-class ArticleSorterTests: XCTestCase {
+final class ArticleSorterTests: XCTestCase {
 
 	// MARK: sortByDate ascending tests
 

Tests/NetNewsWireTests/ScriptingTests/AppleScriptXCTestCase.swift

@@ -8,7 +8,7 @@
 
 import XCTest
 
-class AppleScriptXCTestCase: XCTestCase {
+final class AppleScriptXCTestCase: XCTestCase {
 
     /*
         @function doIndividualScript

Tests/NetNewsWireTests/ScriptingTests/ScriptingTests.swift

@@ -8,7 +8,7 @@
 
 import XCTest
 
-class ScriptingTests: AppleScriptXCTestCase {
+final class ScriptingTests: AppleScriptXCTestCase {
 
     /*
         @function testGenericScript

Tests/NetNewsWireTests/SharingTests.swift

@@ -11,7 +11,7 @@ import XCTest
 
 @testable import NetNewsWire
 
-class SharingTests: XCTestCase {
+final class SharingTests: XCTestCase {
 
     func testSharingSubject() {
         let sharingServiceDelegate = SharingServiceDelegate(nil)

iOS/Account/CloudKitAccountViewController.swift

@@ -18,7 +18,7 @@ enum CloudKitAccountViewControllerError: LocalizedError {
 	}
 }
 
-class CloudKitAccountViewController: UITableViewController {
+final class CloudKitAccountViewController: UITableViewController {
 
 	weak var delegate: AddAccountDismissDelegate?
 	@IBOutlet weak var footerLabel: UILabel!

iOS/Account/FeedbinAccountViewController.swift

@@ -12,7 +12,7 @@ import Secrets
 import RSWeb
 import SafariServices
 
-class FeedbinAccountViewController: UITableViewController {
+final class FeedbinAccountViewController: UITableViewController {
 
 	@IBOutlet weak var activityIndicator: UIActivityIndicatorView!
 	@IBOutlet weak var cancelBarButtonItem: UIBarButtonItem!

iOS/Account/LocalAccountViewController.swift

@@ -9,7 +9,7 @@
 import UIKit
 import Account
 
-class LocalAccountViewController: UITableViewController {
+final class LocalAccountViewController: UITableViewController {
 
 	@IBOutlet weak var nameTextField: UITextField!
 	@IBOutlet weak var footerLabel: UILabel!

iOS/Account/NewsBlurAccountViewController.swift

@@ -12,7 +12,7 @@ import Secrets
 import RSWeb
 import SafariServices
 
-class NewsBlurAccountViewController: UITableViewController {
+final class NewsBlurAccountViewController: UITableViewController {
 
 	@IBOutlet weak var activityIndicator: UIActivityIndicatorView!
 	@IBOutlet weak var cancelBarButtonItem: UIBarButtonItem!

iOS/Account/ReaderAPIAccountViewController.swift

@@ -12,7 +12,7 @@ import Secrets
 import RSWeb
 import SafariServices
 
-class ReaderAPIAccountViewController: UITableViewController {
+final class ReaderAPIAccountViewController: UITableViewController {
 
 	@IBOutlet weak var activityIndicator: UIActivityIndicatorView!
 	@IBOutlet weak var cancelBarButtonItem: UIBarButtonItem!

iOS/Add/AddComboTableViewCell.swift

@@ -8,7 +8,7 @@
 
 import UIKit
 
-class AddComboTableViewCell: VibrantTableViewCell {
+final class AddComboTableViewCell: VibrantTableViewCell {
 
 	@IBOutlet weak var icon: UIImageView!
 	@IBOutlet weak var label: UILabel!

iOS/Add/AddFeedFolderViewController.swift

@@ -14,7 +14,7 @@ protocol AddFeedFolderViewControllerDelegate: AnyObject {
 	func didSelect(container: Container)
 }
 
-class AddFeedFolderViewController: UITableViewController {
+final class AddFeedFolderViewController: UITableViewController {
 
 	weak var delegate: AddFeedFolderViewControllerDelegate?
 	var initialContainer: Container?

iOS/Add/AddFeedSelectFolderTableViewCell.swift

@@ -8,7 +8,7 @@
 
 import UIKit
 
-class AddFeedSelectFolderTableViewCell: VibrantTableViewCell {
+final class AddFeedSelectFolderTableViewCell: VibrantTableViewCell {
 
 	@IBOutlet weak var folderLabel: UILabel!
 	@IBOutlet weak var detailLabel: UILabel!