anchor.diff:      LN_A
   }
   
  +interface Output {
  +    void serverId(ServerId serverId);
  +}
  +
   // later
  +Output out; // is a MethodWriter
  +
   out.serverId(ServerId.LN_A);
   ----
   
  
positive.code:     eventTime: 2020-09-09T09:09:09.999,
      data: !ServerId {
          name: LN_A,
          properity: 128
      }
  }
  ----
  
  You can choose to update the existing `enum` with this information.
  
  [source,java]
  ----
  public void refData(RefData refData) {
      updateEnum(refData.data);
  }
  ----
  
  
negative.code:     eventTime: 2020-09-09T09:09:09.999,
      data: !ServerId {
          name: HK_A,
          priority: 200
      }
  }
  ----
  