private boolean isDisposed() {
		return fileChooserModel == null;
	}
Updates the given directory and selects the given file.

@param directory The directory to load and update
@param fileToSelect The file to select after updating the dir (may be null).
@param forceUpdate True signals to force the directory to update, even if it is the current
       directory
@param addToHistory True signals to add the given directory to the navigation history
Ghidra/Framework/Docking/src/main/java/docking/widgets/filechooser/GhidraFileChooser.java