@Override
    public byte[] getBytes(int start, int end) {
        int size = end - start;
        byte [] rval = new byte[size];
        System.arraycopy(buffer, start, rval, 0, size);
        return rval;
    }
@see io.apiman.gateway.engine.io.IApimanBuffer#getBytes(int, int)
gateway/engine/core/src/main/java/io/apiman/gateway/engine/io/ByteBuffer.java