docs: def renderer(format, mimetypes=(), priority=0, name=None, test=None):
      """
      Decorates a view method to say that it renders a particular format and mimetypes.
  
      Use as:
          @renderer(format="foo")
          def render_foo(self, request, context, template_name): ...
      or
          @renderer(format="foo", mimetypes=("application/x-foo",))
          def render_foo(self, request, context, template_name): ...
      
      The former case will inherit mimetypes from the previous renderer for that
      format in the MRO. Where there isn't one, it will default to the empty
      tuple.
  
      Takes an optional priority argument to resolve ties between renderers.
      """
  
      def g(f):
          return Renderer(f, format, mimetypes, priority, name, test)
      return g