redo method

bool redo()

Restores the next scene state after undo.

Implementation

bool redo() {
  if (_redoStack.isEmpty) return false;
  _pushUndo(toJson());
  _loadJson(_redoStack.removeLast());
  render();
  _emitSelect();
  _emitChange();
  onRedo?.call(this);
  return true;
}