private boolean anyMemberHasOlderVersion(final Stream<ID> members) {
    return members
        .anyMatch(member -> KnownVersion.CURRENT.isNewerThan(member.getVersion()));
  }
Analyze a given view object, generate events as appropriate
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/GMSMembership.java