public byte getNextOperation() {
        if (i >= operations.length) {
            return 0;
        }
        return operations[i++];
    }
Stream with extra data outside the actual input stream.

@author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
vespaclient-container-plugin/src/test/java/com/yahoo/vespa/http/server/MetaStream.java