@Override
    public void quorumLost(DistributionManager distributionManager,
        Set<InternalDistributedMember> failures, List<InternalDistributedMember> remaining) {
      // do nothing
    }
Used to get membership events from our advisor to implement RegionMembershipListener
invocations.

@since GemFire 5.0
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedRegion.java