Use BatchUpdate.shared.

Evergreen/AppDelegate.swift

@@ -16,7 +16,6 @@ import Account
 
 let appName = "Evergreen"
 var currentTheme: VSTheme!
-let batchUpdate = BatchUpdate()
 
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations {

Evergreen/BatchUpdate.swift

@@ -17,6 +17,8 @@ public extension Notification.Name {
 
 final class BatchUpdate {
 	
+	static let shared = BatchUpdate()
+	
 	private var count = 0
 	
 	var isPerforming: Bool {

Evergreen/MainWindow/Sidebar/SidebarViewController.swift

@@ -73,7 +73,7 @@ import Account
 		outlineView.removeItems(at: selectedRows, inParent: nil, withAnimation: [.slideDown])
 		outlineView.endUpdates()
 
-		batchUpdate.perform {
+		BatchUpdate.shared.perform {
 			deleteItemsForNodes(nodesToDelete)
 		}
 		
@@ -164,7 +164,7 @@ private extension SidebarViewController {
 	
 	func rebuildTreeAndReloadDataIfNeeded() {
 		
-		if !batchUpdate.isPerforming {
+		if !BatchUpdate.shared.isPerforming {
 			treeController.rebuild()
 			outlineView.reloadData()
 		}

Importers/DefaultFeedsImporter.swift

@@ -42,7 +42,7 @@ struct FeedsImporter {
 		
 		let feedsToImport = feeds(with: feedDictionaries, accountID: account.accountID)
 		
-		batchUpdate.perform {
+		BatchUpdate.shared.perform {
 			for feed in feedsToImport {
 				if !account.hasFeed(with: feed.feedID) {
 					let _ = account.addFeed(feed, to: nil)

Importers/OPMLImporter.swift

@@ -38,7 +38,7 @@ struct OPMLImporter {
 		}
 
 		if let opmlDocument = opmlDocument {
-			batchUpdate.perform {
+			BatchUpdate.shared.perform {
 				account.importOPML(opmlDocument)
 			}
 		}