Shadow/MQTT Disconnect Callback Implementation for beta release [57b18d7] ? (CA-150)

[devUsama]

I’m running a shadow application that is based on the beta release [57b18d7]. In this implementation the MQTT connection is established by calling EstablishMqttSession function and its parameter is a user event callback of type MQTTEventCallback_t that notify the user about incoming packet events but not MQTT events like disconnect. So to be exact how to get notify about MQTT connection lost event? I can't find any implementation on it in the beta release.