v2.6.0 Matter project question (maybe a c++ question)

I have ported my 2.5.2 project to 2.6.0 - its not 100% functional but that i because the buttons events are handled slightly differently. Anyways, there is this structure initialized at the top of app_task:

Identify sIdentify = { kContactSensorEndpointId, AppTask::IdentifyStartHandler, AppTask::IdentifyStopHandler,
               Clusters::Identify::IdentifyTypeEnum::kVisibleIndicator };
I can't seem to figure out what consumes this. I can chalk this up to my inexperience with C++ but I still would like to know what handles this.
Thanks

A. M.

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