cut method
void
cut()
Cuts the selection and copies it to the clipboard
Implementation
void cut( ) {
final text = getStringSelection();
if (text.isEmpty) return;
Clipboard.setData(ClipboardData(text: text ));
final from = _textEditingController.selection.start;
final to = _textEditingController.selection.end;
_textEditingController.text.replaceRange(from, to, "" );
}