code: def display_js(self):
      # XXX How to do this just once? It has to deal with multiple
      # browser instances using the same kernel (require.js - but the
      # file isn't static?).
      display(Javascript(FigureManagerNbAgg.get_javascript()))
  
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 3 for calling the FigureManagerNbAgg obj's underlying member method code with example usage: obj.display_js() without return types