How can I find the built-in (referenceapplication.registrationapp.registerPatient) json definition?

Question: I am new with OpenMRS! I have disabled referenceapplication.registrationapp.registerPatient in my manage app. I added a new App Definition for registration. But now I need to some fields to work like default (Relative part). Cause of that I need to built in json definition to use from that.**

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