protected MemberMXBean getProxyByMemberNameOrId(String member) {
    try {
      ObjectName objectName = MBeanJMXAdapter.getMemberMBeanName(member);
      return mapOfMembers.get(objectName);
    } catch (ManagementException mx) {
      return null;
    }
  }
Helper method to get a member bean reference given a member name or id

@param member name or id of the member
@return the proxy reference
geode-core/src/main/java/org/apache/geode/management/internal/beans/DistributedSystemBridge.java