def __init__(self, version, available_add_on_sid, sid):
super(AvailableAddOnExtensionContext, self).__init__(version)<EOL>self._solution = {'<STR_LIT>': available_add_on_sid, '<STR_LIT>': sid, }<EOL>self._uri = '<STR_LIT>'.format(**self._solution)<EOL>
Initialize the AvailableAddOnExtensionContext

:param Version version: Version that contains the resource
:param available_add_on_sid: The available_add_on_sid
: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