# Pastebin X3qprx5z
    def _validate_create_hm(self, lock_session, hm_dict):
        """Validate creating health monitor on pool."""
        mandatory_fields = (consts.TYPE, consts.DELAY, consts.TIMEOUT,
                            consts.POOL_ID, consts.MAX_RETRIES)
        for field in mandatory_fields:
            if hm_dict[field] is None:
                raise exceptions.InvalidOption(value='None', option=field)

        if hm_dict[consts.TYPE] != consts.HEALTH_MONITOR_HTTP:
            if hm_dict[consts.HTTP_METHOD]:
                raise exceptions.InvalidOption(
                    value=consts.HTTP_METHOD, option='health monitors of '
                    'type {}'.format(hm_dict[consts.TYPE]))
            if hm_dict[consts.URL_PATH]:
                raise exceptions.InvalidOption(
                    value=consts.URL_PATH, option='health monitors of '
                    'type {}'.format(hm_dict[consts.TYPE]))
            if hm_dict[consts.EXPECTED_CODES]:
                raise exceptions.InvalidOption(
                    value=consts.EXPECTED_CODES, option='health monitors of '
                    'type {}'.format(hm_dict[consts.TYPE]))
        else:
            if not hm_dict[consts.HTTP_METHOD]:
                hm_dict[consts.HTTP_METHOD] = (
                    consts.HEALTH_MONITOR_HTTP_DEFAULT_METHOD)
            if not hm_dict[consts.URL_PATH]:
                hm_dict[consts.URL_PATH] = (
                    consts.HEALTH_MONITOR_DEFAULT_URL_PATH)
            if not hm_dict[consts.EXPECTED_CODES]:
                hm_dict[consts.EXPECTED_CODES] = (
                    consts.HEALTH_MONITOR_DEFAULT_EXPECTED_CODES)