code: def render_content(self, request):
          
          context = self.data.copy()
          context.update(self.render_vars(request))
          return render(self.template, request.app, context, request=request)
docs: Return a string containing the HTML to be rendered for the panel.
  
          By default this will render the template defined by the
          :attr:`.template` attribute with a rendering context defined by
          :attr:`.data` combined with the ``dict`` returned from
          :meth:`.render_vars`.
  
          The ``request`` here is the active request in the toolbar. Not the
          original request that this panel represents.