code: def undo(self, text):
      cmds = self.cmds[:]
      cmds.reverse()
      for cmd in cmds:
          cmd.undo(text)
  
imports: import string
  from idlelib.delegator import Delegator
label_desc: Use image node_id 7 for calling the CommandSequence obj's underlying member method code with example usage: obj.undo(text) without return types