code: def _create_comm(self):
      comm = CommSocket(self)
      self.add_web_socket(comm)
      return comm
  
imports: import six
  from base64 import b64encode
  import io
  import json
  import os
  import uuid
  from IPython.display import display, Javascript, HTML
  from matplotlib import rcParams, is_interactive
  from matplotlib._pylab_helpers import Gcf
  from matplotlib.backend_bases import _Backend, FigureCanvasBase, NavigationToolbar2
  from matplotlib.backends.backend_webagg_core import FigureCanvasWebAggCore, FigureManagerWebAgg, NavigationToolbar2WebAgg, TimerTornado
label_desc: Use image node_id 7 for calling the FigureManagerNbAgg obj's underlying member method code with example usage: obj._create_comm() and returns: comm