'User' in 'User-defined classes'
This might help you It means the classes which is created by user
(developer or you) is User-defined classes. For example you create one
class with "test.m", then "test.m" is user defined class.NSString,
NSNumber, NSMutableArray are not user defined
Date : November 19 2020, 01:01 AM , By : Mohammed Al Qassem