class SomeViewController: NSViewController {

	@IBOutlet weak var textField: NSTextField
	private var NSTimer: fetchDataTimer?
	private var currentText: String? {
		didSet {
			invalidateTimer()
			if currentText.length > 3 {
				restartTimer()
			}
		}
	}
	
	func textDidChange(notification: NSNotification) {

		currentText = textField.stringValue
	}

	func invalidateTimer() {
	
		if let timer = timer {
			if timer.isValid {
				timer.invalidate()
			}
		self.timer = nil
		}
	}
	
	

}