static DrivenRectTransformUndo()
{
Undo.willFlushUndoRecord = (Undo.WillFlushUndoRecord) Delegate.Combine(Undo.willFlushUndoRecord, new Undo.WillFlushUndoRecord(DrivenRectTransformUndo.ForceUpdateCanvases));
Undo.undoRedoPerformed = (Undo.UndoRedoCallback) Delegate.Combine(Undo.undoRedoPerformed, new Undo.UndoRedoCallback(DrivenRectTransformUndo.ForceUpdateCanvases));
}