@Override
    public int compare(PersistentMemberID id1, PersistentMemberID id2) {
      return id1.getName().compareTo(id2.getName());
    }
GEODE-5402: This test creates a scenario where a member has two versions (based on timeStamp)
of another member. The call to getMembersToWaitFor should return that we wait for neither of
them.
geode-core/src/test/java/org/apache/geode/internal/cache/persistence/PersistenceAdvisorImplTest.java