'Constructs a InstalledAddOnExtensionContext
:param sid: The unique Extension Sid
:returns: twilio.rest.preview.marketplace.installed_add_on.installed_add_on_extension.InstalledAddOnExtensionContext
:rtype: twilio.rest.preview.marketplace.installed_add_on.installed_add_on_extension.InstalledAddOnExtensionContext'

def __call__(self, sid):

    return InstalledAddOnExtensionContext(self._version, installed_add_on_sid=self._solution['installed_add_on_sid'], sid=sid)
