def get(self, request, *args, **kwargs):
        """ return list of open 311 services  """
        # init django rest framework specific stuff
        serializer_class = self.get_serializer_class()
        context = self.get_serializer_context()

        # init empty list
        services = []

        # loop over each service
        for service_type in SERVICES.keys():
            # initialize serializers for layer
            services.append(
                serializer_class(
                    object(),
                    context=context,
                    service_type=service_type
                ).data
            )

        return Response(services)
return list of open 311 services