A signal that retains prior values and supports undo and redo.
Removes all retained undo and redo values without changing the current value.
Restores the next value in the redo history. Returns whether a value was restored.
Restores the most recent prior value. Returns whether a value was restored.
Whether an undone value can be restored.
Whether an earlier value can be restored.
A signal that retains prior values and supports undo and redo.