getSelectedWidget method Null safety
protected">@protected
Returns a DiagnosticsNode representing the currently selected Element.
If the currently selected Element is identical to the Element
referenced by previousSelectionId
then the previous DiagnosticsNode is
reused.
Implementation
@protected
String getSelectedWidget(String? previousSelectionId, String groupName) {
return _safeJsonEncode(_getSelectedWidget(previousSelectionId, groupName));
}