It's Objective-C being referred to here: the "+" prefix indicates a class method. Any class can implement +load and the runtime will call the method upon loadi

It's Objective-C being referred to here: the "+" prefix indicates a class method. Any class can implement +load and the runtime will call the method upon loading the class (note, this doesn't require using it at all). https://developer.apple.com/documentation/objectivec/nsobject/1418815-load?language=objc https://developer.apple.com/documentation/objectivec/nsobjec...