public synchronized String getUndoName() {
		if (canUndo()) {
			return undoList.getLast();
		}
		return "";
	}
Get the transaction name that is available for {@link #undo()} (see {@link #canUndo()}).
@return transaction name that is available for {@link #undo()} or empty String.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/StandAloneDataTypeManager.java