public String getUtf8String() {
        int stringLength = getInt1_4Bytes();
        byte[] stringBytes = new byte[stringLength];
        get(stringBytes);
        return Utf8.toString(stringBytes);
    }
Reads a string from the buffer as a 1_4 encoded length in bytes followed by the utf8 bytes
vespajlib/src/main/java/com/yahoo/io/GrowableByteBuffer.java