@Override
  public Set<ID> send(final ID[] destinations,
      final Message<ID> content)
      throws NotSerializableException {
    checkAddressesForUUIDs(destinations);
    Set<ID> failures = services.getMessenger().send(content);
    if (failures == null || failures.size() == 0) {
      return Collections.emptySet();
    }
    return failures;
  }
Test hook to wait until we are no longer "Playing dead"

TODO - remove this!
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/GMSMembership.java