Helper to manage UndoRedo in the editor or custom tools.
See Source File
MIT License
Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) Copyright (c) 2017-2018 Godot-D contributors
Helper to manage UndoRedo in the editor or custom tools.