def create(self, body=values.unset, media_url=values.unset):
data = values.of({'<STR_LIT>': body, '<STR_LIT>': serialize.map(media_url, lambda e: e), })<EOL>payload = self._version.create(<EOL>'<STR_LIT:POST>',<EOL>self._uri,<EOL>data=data,<EOL>)<EOL>return MessageInteractionInstance(<EOL>self._version,<EOL>payload,<EOL>service_sid=self._solution['<STR_LIT>'],<EOL>session_sid=self._solution['<STR_LIT>'],<EOL>participant_sid=self._solution['<STR_LIT>'],<EOL>)<EOL>
Create a new MessageInteractionInstance

:param unicode body: Message body
:param unicode media_url: Reserved

:returns: Newly created MessageInteractionInstance
:rtype: twilio.rest.proxy.v1.service.session.participant.message_interaction.MessageInteractionInstance