def __call__(self, sid):
return AvailableAddOnContext(self._version, sid=sid, )<EOL>
Constructs a AvailableAddOnContext

:param sid: The unique Available Add-on Sid

:returns: twilio.rest.preview.marketplace.available_add_on.AvailableAddOnContext
:rtype: twilio.rest.preview.marketplace.available_add_on.AvailableAddOnContext