code: def add_method(self, f, name=None):
          
          assert callable(f), "method argument must be callable"
          # catches a few programming errors that are
          # commonly silently swallowed otherwise
          if not name:
              name = f.__name__
  
          if name in self.method_map:
              raise exc.RPCError('Name %s already registered')
  
          self.method_map[name] = f
docs: Add a method to the dispatcher.
  
          :param f: Callable to be added.
          :type f: callable
          :param str name: Name to register it with. If ``None``, ``f.__name__`` will
                       be used.
          :raises ~tinyrpc.exc.RPCError: When the `name` is already registered.