'Update the MessageInstance
:param unicode body: The body
:returns: Updated MessageInstance
:rtype: twilio.rest.api.v2010.account.message.MessageInstance'

def update(self, body):

    data = values.of({'Body': body})
    payload = self._version.update('POST', self._uri, data=data)
    return MessageInstance(self._version, payload, account_sid=self._solution['account_sid'], sid=self._solution['sid'])
