def update(self, body=values.unset, attributes=values.unset,<EOL>date_created=values.unset, date_updated=values.unset,<EOL>last_updated_by=values.unset, from_=values.unset):
return self._proxy.update(<EOL>body=body,<EOL>attributes=attributes,<EOL>date_created=date_created,<EOL>date_updated=date_updated,<EOL>last_updated_by=last_updated_by,<EOL>from_=from_,<EOL>)<EOL>
Update the MessageInstance

:param unicode body: The message to send to the channel
:param unicode attributes: A valid JSON string that contains application-specific data
:param datetime date_created: The ISO 8601 date and time in GMT when the resource was created
:param datetime date_updated: The ISO 8601 date and time in GMT when the resource was updated
:param unicode last_updated_by: The Identity of the User who last updated the Message, if applicable
:param unicode from_: The identity of the message's author

:returns: Updated MessageInstance
:rtype: twilio.rest.chat.v2.service.channel.message.MessageInstance