public void expand(RPChromosomeRegion testRegion) {
        if (testRegion.startChromID < startChromID ||
                (testRegion.startChromID == startChromID &&
                        testRegion.startBase < startBase)) {
            startChromID = testRegion.startChromID;
            startBase = testRegion.startBase;
        }

        if (testRegion.endChromID > endChromID ||
                (testRegion.endChromID == endChromID &&
                        testRegion.endBase > endBase)) {
            endChromID = testRegion.endChromID;
            endBase = testRegion.endBase;
        }


    }