public static String formatMetricByteSizeString(final Long streamSize) {
        return formatMetricByteSizeString(streamSize, false);
    }
Return nice string like "25 B", "4 kB", "45 MB", etc.
stroom-legacy/stroom-legacy-model_6_1/src/main/java/stroom/legacy/model_6_1/ModelStringUtil.java