code: def destroy(self):
      self._send_event("close")
      # need to copy comms as callbacks will modify this list
      for comm in list(self.web_sockets):
          comm.on_close()
      self.clearup_closed()
  
imports: from base64 import b64encode
  import io
  import json
  import pathlib
  import uuid
  from ipykernel.comm import Comm
  from IPython.display import display, Javascript, HTML
  from matplotlib import is_interactive
  from matplotlib._pylab_helpers import Gcf
  from matplotlib.backend_bases import _Backend, CloseEvent, NavigationToolbar2
  from .backend_webagg_core import FigureCanvasWebAggCore, FigureManagerWebAgg, NavigationToolbar2WebAgg
  from .backend_webagg_core import TimerTornado, TimerAsyncio
label_desc: Use image node_id 9 for calling the FigureManagerNbAgg obj's underlying member method code with example usage: obj.destroy() without return types