attachTextInputClient method
      
dynamic
attachTextInputClient()
      
     
    
    
Implementation
attachTextInputClient() {
  _textInputConnection?.close();
  _textInputConnection = TextInput.attach(
      this, const TextInputConfiguration(enableDeltaModel: true));
  if (!Platform.isWindows) {
    _textInputConnection?.show();
  }
  // _textInputConnection
}