@Override
	public void dispose() {
		super.dispose();
		closeCleanup();
		modelUpdater.dispose();
		actionManager.dispose();
		optionsDialog.dispose();

		worker.dispose();
		fileChooserModel = null;
	}
Returns true if the file exists on disk OR if it is a logical dir, like 'My Computer'
Ghidra/Framework/Docking/src/main/java/docking/widgets/filechooser/GhidraFileChooser.java