def get(self, sid):
return AvailableAddOnExtensionContext(<EOL>self._version,<EOL>available_add_on_sid=self._solution['<STR_LIT>'],<EOL>sid=sid,<EOL>)<EOL>
Constructs a AvailableAddOnExtensionContext

:param sid: The unique Extension Sid

:returns: twilio.rest.preview.marketplace.available_add_on.available_add_on_extension.AvailableAddOnExtensionContext
:rtype: twilio.rest.preview.marketplace.available_add_on.available_add_on_extension.AvailableAddOnExtensionContext