code: def command_line(self):
      return " ".join(self.controller_cmd + self.controller_args)
  
imports: import os
  import re
  import uuid
  from xml.etree import ElementTree
  from traitlets import Bool, Enum, Instance, Integer, List, Unicode
  from traitlets.config.configurable import Configurable
label_desc: Use image node_id 2 for calling the IPControllerTask obj's underlying member method code with example usage: obj.command_line() and returns: str