@staticmethod<EOL><INDENT>def _normalize_http_methods(http_method):<DEDENT>
if http_method.upper() == '<STR_LIT>':<EOL><INDENT>for method in SamApiProvider._ANY_HTTP_METHODS:<EOL><INDENT>yield method.upper()<EOL><DEDENT><DEDENT>else:<EOL><INDENT>yield http_method.upper()<EOL><DEDENT>
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)