docs: private static void checkNoConflictInValueBucket(
        Object value, Entry<?, ?> entry, @Nullable ImmutableMapEntry<?, ?> valueBucketHead) {
      for (; valueBucketHead != null; valueBucketHead = valueBucketHead.getNextInValueBucket()) {
        checkNoConflict(!value.equals(valueBucketHead.getValue()), "value", entry, valueBucketHead);
      }
    }