open

Description:

public async File? open (Window? parent, Cancellable? cancellable) throws Error

This function initiates a file selection operation by presenting a file chooser dialog to the user.

The callback will be called when the dialog is dismissed. It should call [method@Gtk.FileDialog.open_finish] to obtain the result.

this	a `GtkFileDialog`
parent	the parent `GtkWindow`
cancellable	a `GCancellable` to cancel the operation
callback	a callback to call when the operation is complete
user_data	data to pass to `callback`