@Override
    @CheckForNull
    public Comparator<? super K> comparator() {
      return fromMap().comparator();
    }

    @Override
    @ParametricNullness
    public K firstKey() {
      return fromMap().firstKey();
    }

    @Override
    public SortedMap<K, V2> headMap(@ParametricNullness K toKey) {
      return transformEntries(fromMap().headMap(toKey), transformer);
    }

HSPLokio/Segment;->pop()Lokio/Segment;
HSPLokio/Segment;->push(Lokio/Segment;)Lokio/Segment;
HSPLokio/Segment;->writeTo(Lokio/Segment;I)V
HSPLokio/SegmentPool;-><clinit>()V
HSPLokio/SegmentPool;-><init>()V
HSPLokio/SegmentPool;->firstRef()Ljava/util/concurrent/atomic/AtomicReference;
HSPLokio/SegmentPool;->recycle(Lokio/Segment;)V
HSPLokio/SegmentPool;->take()Lokio/Segment;
HSPLokio/SocketAsyncTimeout;-><init>(Ljava/net/Socket;)V