@Override
  public Set<InternalDistributedMember> getAllOtherMembers() {
    Set<InternalDistributedMember> result =
        getDistributionManagerIdsIncludingAdmin();
    result.remove(getDistributionManagerId());
    return result;
  }
Returns true if this distribution manager has been closed.
geode-core/src/main/java/org/apache/geode/distributed/internal/ClusterDistributionManager.java