def update(self, friendly_name=values.unset, unique_name=values.unset,<EOL>attributes=values.unset):
data = values.of({<EOL>'<STR_LIT>': friendly_name,<EOL>'<STR_LIT>': unique_name,<EOL>'<STR_LIT>': attributes,<EOL>})<EOL>payload = self._version.update(<EOL>'<STR_LIT:POST>',<EOL>self._uri,<EOL>data=data,<EOL>)<EOL>return ChannelInstance(<EOL>self._version,<EOL>payload,<EOL>service_sid=self._solution['<STR_LIT>'],<EOL>sid=self._solution['<STR_LIT>'],<EOL>)<EOL>
Update the ChannelInstance

:param unicode friendly_name: A human-readable name for the Channel.
:param unicode unique_name: A unique, addressable name for the Channel.
:param unicode attributes: An optional metadata field you can use to store any data you wish.

:returns: Updated ChannelInstance
:rtype: twilio.rest.chat.v1.service.channel.ChannelInstance