def lookup_api_method(self, api_method_name):
return self.__api_methods.get(api_method_name)<EOL>
Looks an API method up by name to find the backend method to call.

        Args:
          api_method_name: Name of the method in the API that was called.

        Returns:
          Name of the ProtoRPC method called on the backend, or None if not found.