public String[] getMembers() {
    Iterator<ObjectName> it = mapOfProxy.keySet().iterator();
    if (it != null) {
      List<String> memberList = new ArrayList<>();
      while (it.hasNext()) {
        ObjectName tempObjName = it.next();
        String formatedMemberId = tempObjName.getKeyProperty("member");
        memberList.add(formatedMemberId);
      }
      String[] members = new String[memberList.size()];
      return memberList.toArray(members);
    }
    return ManagementConstants.NO_DATA_STRING;
  }
@return set of member ids on which this region is present.
geode-core/src/main/java/org/apache/geode/management/internal/beans/DistributedRegionBridge.java