MyPrivateClass.m

// MyPrivateClass.m
#import "MyPrivateClass.h"

@implementation MyPrivateClass

@synthesize privateProperty;

+ (void)load {
    // This is called once, when module is being loaded,
    // "Invoked whenever a class or category is added to the Objective-C
    // runtime; implement this method to perform class-specific behavior
    // upon loading."
    [Factory registerPrivateClassTypeWithType:[MyPrivateClass class]];
}

- (void)doSomethingInternalWithSecretAttribute:(NSInteger)attribute {
    NSLog(@"INTERNAL METHOD CALLED WITH SUCCESS %ld", (long)attribute);
}