Fix object type in replaceObjectInFooAtIndex:withObject:

The generated .m files should use the object class in

- (void)replaceObjectInFoosAtIndex:(NSUInteger)idx withObject:(Foo*)value

rather than the collection class (eg - (void)replaceObjectInFoosAtIndex:(NSUInteger)idx withObject:(NSOrderedSet*)value)


The .h file for the same method has the correct type.