@protocol P @end
@interface NSMutableArray
- (id)objectAtIndexedSubscript:(unsigned int)index;
- (void)setObject:(id)object atIndexedSubscript:(unsigned int)index;
@end
@interface NSMutableDictionary
- (id)objectForKeyedSubscript:(id)key;
- (void)setObject:(id)object forKeyedSubscript:(id)key;
@end
void all() {
NSMutableArray *array;
id oldObject = array[10];
array[10] = oldObject;
NSMutableDictionary *dictionary;
id key;
id newObject;
oldObject = dictionary[key];
dictionary[key] = newObject;
}