Simple issue with programming

I have a problem and need your help to solve it. When the code jump into the CAYENNE_IN() functions and CAYENNE_OUT_DEFAULT()? And will they happen sequentially? I want to jump to these functions from the main loop so that they appear when I want to, is it possible? I have read Cayenne basics here: Getting Started with Cayenne - Arduino - The Engineering Projects Looking forward to your answer.

These function is called at every 15 second interval. Sending MQTT messages within rate limits

This function is for receiving data from the cayenne dashboard to your device.