def __call__(self, sid):
return AssignedAddOnContext(<EOL>self._version,<EOL>account_sid=self._solution['<STR_LIT>'],<EOL>resource_sid=self._solution['<STR_LIT>'],<EOL>sid=sid,<EOL>)<EOL>
Constructs a AssignedAddOnContext

:param sid: The unique string that identifies the resource

:returns: twilio.rest.api.v2010.account.incoming_phone_number.assigned_add_on.AssignedAddOnContext
:rtype: twilio.rest.api.v2010.account.incoming_phone_number.assigned_add_on.AssignedAddOnContext