private FST.Arc<BytesRef> scratchArc;

    private FST<BytesRef> fst;

    private FST.BytesReader fstReader;

    private final BytesRef scratchBytes = new BytesRef();

    private final CharsRef scratchChars = new CharsRef();

    private int longestMatchEndOffset;

    private int ch;

    private final char[] readBuffer;

    private int readBufferIndex;

    private int readBufferLen;