hide method
void
hide()
Hide secure keyboard.
Implementation
void hide() {
_focusNode = null;
_initText = null;
_hintText = null;
_inputTextLengthSymbol = null;
_doneKeyText = null;
_clearKeyText = null;
_maxLength = null;
_onKeyPressed = null;
_onCharCodesChanged = null;
_onDoneKeyPressed = null;
_onCloseKeyPressed = null;
_isShowing = false;
notifyListeners();
}