code: def animate(event):
      if button.name == "► Play":
          button.name = "❚❚ Pause"
          callback.start()
      else:
          button.name = "► Play"
          callback.stop()
  
file_path: holoviews/examples/gallery/apps/bokeh/gapminder.py
imports: import pandas
  import numpy
  import holoviews
  import panel
  from bokeh.sampledata import gapminder
  from holoviews import dim, opts
label_desc: Use image node_id 3 for calling a global function with example usage: animate(event) without return types