public List<ID> getNewMembers() {
    List<ID> result = new ArrayList<>(5);
    result.addAll(members.stream().filter(mbr -> mbr.getVmViewId() == viewId)
        .collect(Collectors.toList()));
    return result;
  }
return members added in this view
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/GMSMembershipView.java