Generates the key to the _dict_of_routes based on the list of methods
        and path supplied

        :param list(str) methods: List of HTTP Methods
        :param str path: Path off the base url
        :return: str of Path:Method

def _generate_route_keys(self, methods, path):
        """
        Generates the key to the _dict_of_routes based on the list of methods
        and path supplied

        :param list(str) methods: List of HTTP Methods
        :param str path: Path off the base url
        :return: str of Path:Method
        """
        for method in methods:
            yield self._route_key(method, path)