'Create a new MessageInteractionInstance
:param unicode body: The body of the message. Up to 1600 characters long.
:param unicode media_url: The url of an image or video.
:returns: Newly created MessageInteractionInstance
:rtype: twilio.rest.preview.proxy.service.session.participant.message_interaction.MessageInteractionInstance'

def create(self, body=values.unset, media_url=values.unset):

    data = values.of({'Body': body, 'MediaUrl': media_url})
    payload = self._version.create('POST', self._uri, data=data)
    return MessageInteractionInstance(self._version, payload, service_sid=self._solution['service_sid'], session_sid=self._solution['session_sid'], participant_sid=self._solution['participant_sid'])
