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- NSMutableArray *array = [[NSMutableArray alloc] init];
- for(B *b in A.bObjects)
- {
- if([b.cObjects count] == 0)
- [array addObject:b];
- }
- NSPredicate* predicate = [NSPredicate predicateWithString:@"cObjects.@count == 0"];
- NSArray* emptyCObjects = [A.bObjects filteredArrayUsingPredicate:predicate];
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