Method invalidateAll

guava/src/com/google/common/cache/LocalCache.java:4313–4318

(Iterable<?> keys)

  }

  void invalidateAll(Iterable<?> keys) {
    // TODO(fry): batch by segment
    for (Object key : keys) {
      remove(key);
    }
  }

  @LazyInit @RetainedWith @Nullable Set<K> keySet;