kotlin collections HashSet E MutableSet initialCapacity Int loadFactor Float elements Collection size add Boolean element addAll clear Unit contains containsAll isEmpty iterator MutableIterator remove removeAll retainAllJ             " *BB(B((B (J 2(8HJ2 (8HJ8HJ2(8HJ2 (8HJ8HJ8HJ2(8HJ2 (8HJ2 (8HR HX0 H 0 0 0 8 0 0 0 0