@Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append(pos);
        builder.append("/");
        builder.append(size);
        return builder.toString();
    }
Utility used in the logging code to output human readable progress for zero
based index processing. e.g. size = 10, index = 0, outputs "1/10"
stroom-util/src/main/java/stroom/util/logging/LogItemProgress.java