def get_instance(self, payload):
        """
        Build an instance of AvailableAddOnExtensionInstance

        :param dict payload: Payload response from the API

        :returns: twilio.rest.preview.marketplace.available_add_on.available_add_on_extension.AvailableAddOnExtensionInstance
        :rtype: twilio.rest.preview.marketplace.available_add_on.available_add_on_extension.AvailableAddOnExtensionInstance
        """
        return AvailableAddOnExtensionInstance(
            self._version,
            payload,
            available_add_on_sid=self._solution['available_add_on_sid'],
        )
Build an instance of AvailableAddOnExtensionInstance

        :param dict payload: Payload response from the API

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