private Set<InternalDistributedMember> createMemberSet(InternalDistributedMember... member) {
    Set<InternalDistributedMember> members = new HashSet<>();
    members.addAll(Arrays.asList(member));
    return members;
  }
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