To understand the change that occurs to add this line in the configuration file of Raspberry Pi, You can run the utility GPIO readall before and after the change, as you can see from the results of both tests.
Kwa kuelewa mabadiliko ambayo hutokea kwa kuongeza mstari huu katika faili ya usanidi wa Raspberry Pi, Unaweza kuendesha Shirika la GPIO readall kabla na baada ya mabadiliko, kama unaweza kuona kutoka matokeo ya majaribio wote.