Function UndoRedo.createAction

Create a new action. After this is called, do all your calls to addDoMethod, addUndoMethod, addDoProperty, and addUndoProperty, then commit the action with commitAction. The way actions are merged is dictated by the merge_mode argument. See mergemode for details.

void createAction (
  const(String) name,
  const(long) merge_mode = 0L
) nothrow @nogc;