public ChooserDialog withOnLastBackPressedListener(OnBackPressedListener listener) {
        if (this._onBackPressed instanceof defBackPressed) {
            ((defBackPressed) this._onBackPressed)._onLastBackPressed = listener;
        }
        return this;
    }
public ChooserDialog withOnLastBackPressedListener ( OnBackPressedListener listener ) { if ( this . _onBackPressed instanceof defBackPressed ) { ( ( defBackPressed ) this . _onBackPressed ) . _onLastBackPressed = listener ; } return this ; }
called if {@link KeyEvent#KEYCODE_BACK} is caught,
and current directory is the root of Primary/SdCard storage.