public void processChange(int oldLine1, int oldLine2, int shift) {
    UpdatedLineRange newRange = DiffUtil.updateRangeOnModification(myLine1, myLine2, oldLine1, oldLine2, shift);
    myLine1 = newRange.startLine;
    myLine2 = newRange.endLine;
  }
public void processChange(int oldLine1, int oldLine2, int shift)