def update(self, friendly_name=values.unset, unique_name=values.unset,<EOL>attributes=values.unset, date_created=values.unset,<EOL>date_updated=values.unset, created_by=values.unset):
return self._proxy.update(<EOL>friendly_name=friendly_name,<EOL>unique_name=unique_name,<EOL>attributes=attributes,<EOL>date_created=date_created,<EOL>date_updated=date_updated,<EOL>created_by=created_by,<EOL>)<EOL>
Update the ChannelInstance

:param unicode friendly_name: A string to describe the resource
:param unicode unique_name: An application-defined string that uniquely identifies the resource
: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 created_by: The identity of the User that created the Channel

:returns: Updated ChannelInstance
:rtype: twilio.rest.chat.v2.service.channel.ChannelInstance