class_docstr: Manager for Comms in the Kernel
class_docstr_tok: ["Manager","for","Comms","in","the","Kernel"]
docstr: Unregister a callable registered with register_target
docstr_tok: ["Unregister","a","callable","registered","with","register_target"]
code: def unregister_target(self, target_name, f):
      """Unregister a callable registered with register_target"""
      return self.targets.pop(target_name)
  
file_path: catboost/contrib/python/ipykernel/py2/ipykernel/comm/manager.py
imports: import sys
  import logging
  from traitlets.config import LoggingConfigurable
  from ipython_genutils.importstring import import_item
  from ipython_genutils.py3compat import string_types
  from traitlets import Instance, Unicode, Dict, Any, default
  from .comm import Comm
label_desc: Use image node_id 2 for calling the CommManager obj's underlying member method code with example usage: obj.unregister_target(target_name, f) and returns: self