- (instancetype)init
{
    self = [super init];
    if (self) {
        self.transport = [[TransportLayer alloc] init];
    }
    return self;
}

- (void)getObjectsWithCompletion:(void (^)(NSArray *, NSError *))completion {
    [self.transport getDataWithURL:[NSURL URLWithString:@"http://www.mocky.io/v2/5964f18326000059183d75a7"]
                        completion:^(NSArray *array, NSError *error) {
                            if (error) {
                                completion ? completion(nil, error) : nil;
                            } else {
                                NSMutableArray *items = [NSMutableArray array];
                                for (NSDictionary *item in array) {
                                    Category *category = [[Category alloc] initWithJSON:item];
                                    [items addObject:category];
                                }
                                completion ? completion(items, nil) : nil;
                            }
                        }];
}