while (!beginIndicesPerApprover.isEmpty()) {
int beginIndex = beginIndicesPerApprover.remove(0);
int endIndex = (beginIndicesPerApprover.isEmpty()?pendingApprovals.size():beginIndicesPerApprover.get(0));
List<Approval> currApproverList = pendingApprovals.subList(beginIndex, endIndex);
while (!beginIndicesPerApprover.isEmpty()) {
int beginIndex = beginIndicesPerApprover.remove(0);
int endIndex = (beginIndicesPerApprover.isEmpty()?pendingApprovals.size():beginIndicesPerApprover.get(0));
List<Approval> currApproverList = pendingApprovals.subList(beginIndex, endIndex);