Create a new model using raw API response.

def process_raw_data(cls, raw_data):
        """Create a new model using raw API response."""
        properties = raw_data["properties"]

        routes = []
        raw_routes = properties.get("routes", [])
        for raw_route in raw_routes:
            raw_route["parentResourceID"] = raw_data["resourceId"]
            routes.append(Routes.from_raw_data(raw_route))
        properties["routes"] = routes

        subnets = []
        raw_subnets = properties.get("subnets", [])
        for raw_subnet in raw_subnets:
            subnets.append(Resource.from_raw_data(raw_subnet))
        properties["subnets"] = subnets

        return super(RouteTables, cls).process_raw_data(raw_data)