public static DevkitTransactionGroup undo() { if (!DevkitTransactionManager.canUndo) { return(null); } DevkitTransactionGroup devkitTransactionGroup = DevkitTransactionManager.popUndo(); devkitTransactionGroup.undo(); DevkitTransactionManager.pushRedo(devkitTransactionGroup); DevkitTransactionManager.triggerTransactionPerformed(devkitTransactionGroup); return(devkitTransactionGroup); }