How to extend ExternEntry in Device Manager Code of PI Backend

Hi Everyone,
I am exploring “Extending P4Runtime for Architecture-Specific Externs”. Going through the device manager code in the PI repo I encounter this section of code.
Link: PI/proto/frontend/src/device_mgr.cpp at main · p4lang/PI · GitHub

Line 2099 case p4v1::Entity::kExternEntry:
Logger::get()->error(“No extern support yet”);

Do we need to modify this section also in order to make P4runtime support the Architecture specific extern, and if yes, is there any example present on how to extend this section of the code.