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

:param unicode friendly_name: A human-readable name for the Activity, such as 'on-call', 'break', 'email', etc.

:returns: Updated ActivityInstance
:rtype: twilio.rest.taskrouter.v1.workspace.activity.ActivityInstance