CmdBaseexecute()undo()redo()CommandCmdNodeDeleteshape__init__()execute()CmdInsertCommentcontextexecute()CmdInsertOrEditNodeDisplayDialogUmlNodeEdit()string_to_list_smart()CmdLayoutexecute()undo()Most of the commands in Pynsourceare wrapped in command objects, whichhave an execute, undo and redo method.Notice all the sub commands whichimplement specific features, inheritfrom CmdBase.Generated by GitUml www.gituml.com