@Override
    public String toString() {
        return "RangeStoreKey{" +
               "mapUid=" + mapUid +
               ", keyRange=" + keyRange +
               '}';
    }
<mapUid><rangeStartInc><rangeEndExc>
<4 bytes><8 bytes><8 bytes>
stroom-pipeline/src/main/java/stroom/pipeline/refdata/store/offheapstore/RangeStoreKey.java