private String getMemberIdAsString() {
    final String memberIdAsString;
    InternalDistributedMember idm = (InternalDistributedMember) getDistributedMember();
    if (getClientVersion().isOlderThan(KnownVersion.GFE_90)) {
      memberIdAsString = idm.toString();
    } else {
      StringBuilder sb = new StringBuilder();
      idm.addFixedToString(sb, !SocketCreator.resolve_dns);
      memberIdAsString = sb.toString();
    }
    return memberIdAsString;
  }
returns a string representation of this identifier, ignoring the toString cache
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/ClientProxyMembershipID.java