New API for subscribing from a list of MQTT topics and Return tuple of <Topic,Message> as output

I am working in IoT Project. As part of MQTT-Kafka bridge program development I used Bahir. I feel that it will be a good feature to prove a new API to support a list of MQTT topic as input and output as a tuple of <Topic, Message>. This will be useful to reduce resource usage in case of multiple topic subscription. I had developed this feature a like to integrate