How can I know, to which topic the arrived message belongs?

Question

I am developing an App and I am using MQTT protocol supported by Paho library.

I am subscribing to 10 topics, and there will be a messgae(s) published for one at least one topic. now, when I get notified about the arrival of a new messae, how can i know to which topic it belongs?

Update:

Answer 1

The object that you get when the message arrives should have a destination field which will contain the topic.