#import "blocks.h" @implementation Blocks +(BOOL)blockIsNull:(void (^)(void))block { return block == nil; } +(int (^)(int, int, int, int))same:(int (^)(int, int, int, int))block { return block; } +(void (^)(void)) nullBlock { return nil; } +(void (^)(void)) notNullBlock { return ^{}; } @end