def validate_message(self, msg, *parameters):
_, message_fields, header_fields = self._get_parameters_with_defaults(parameters)<EOL>self._validate_message(msg, message_fields, header_fields)<EOL>
Validates given message using template defined with `New Message` and
        field values given as optional arguments.

        Examples:
        | Validate message | ${msg} |
        | Validate message | ${msg} | status:0 |