docs: def get_default_renderer(self, view):
          """
          Return an instance of the first valid renderer.
          (Don't use another documenting renderer.)
          """
          renderers = [renderer for renderer in view.renderer_classes
                       if not issubclass(renderer, BrowsableAPIRenderer)]
          non_template_renderers = [renderer for renderer in renderers
                                    if not hasattr(renderer, 'get_template_names')]
  
          if not renderers:
              return None
          elif non_template_renderers:
              return non_template_renderers[0]()
          return renderers[0]()