gistfile1.m

NSSet *waitingTemp = [self.waitingObjects copy];
    for (NSManagedObject *object in waitingTemp)
    {
        if (! [object hasDependencies])
        {
            __weak typeof (self) weakSelf = self;
            [self.waitingObjects removeObject:object];
            [self.dispatchedObjects addObject:object];
            [SBManagedObjectHelper saveObject:object
                                 syncToServer:YES
                                      success:^(NSManagedObject *savedObject) {
                                          [weakSelf servicesSuccessHandler:savedObject];
                                      } failure:^(NSError *error) {
                                          [weakSelf servicesFailureHandler:error];
                                      }];
        }
    }