Method: Prepare data for the asynchronous request
Method: Run action.
Method: Prepare data for the asynchronous request
Method: Run action.
Method: Callback for image field in `image_upload` form.
Method: Image upload form.
Method: Set a file in user’s session.
Method: Cloning is forbidden.
Method: Unserializing instances of this class is forbidden.
Method: Creates or returns an instance of this class.