void validate(DistributedMember clientJoined) {
      assertThat(notified.get()).isTrue();
      assertThat(member.get()).isEqualTo(clientJoined);
      assertThat(memberId.get()).isEqualTo(clientJoined.getId());
    }
Tests notification of events for cache server in system bridge client process.
geode-core/src/distributedTest/java/org/apache/geode/management/UniversalMembershipListenerAdapterDUnitTest.java