cut method
void
cut()
Cuts the currently selected text to the clipboard.
If no text is selected, does nothing.
Implementation
void cut() {
final sel = selection;
if (sel.start == sel.end) return;
final selectedText = text.substring(sel.start, sel.end);
Clipboard.setData(ClipboardData(text: selectedText));
replaceRange(sel.start, sel.end, '');
}