Normalizes Http Methods. Api Gateway allows a Http Methods of ANY. This is a special verb to denote all
        supported Http Methods on Api Gateway.

        :param str http_method: Http method
        :yield str: Either the input http_method or one of the _ANY_HTTP_METHODS (normalized Http Methods)

def _normalize_http_methods(http_method):
        """
        Normalizes Http Methods. Api Gateway allows a Http Methods of ANY. This is a special verb to denote all
        supported Http Methods on Api Gateway.

        :param str http_method: Http method
        :yield str: Either the input http_method or one of the _ANY_HTTP_METHODS (normalized Http Methods)
        """

        if http_method.upper() == 'ANY':
            for method in SamApiProvider._ANY_HTTP_METHODS:
                yield method.upper()
        else:
            yield http_method.upper()