apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/entity/ReleaseMessage.java/ReleaseMessage/toString
class ReleaseMessage:  @Override
  public String toString() {
    return MoreObjects.toStringHelper(this)
        .omitNullValues()
        .add("id", id)
        .add("message", message)
        .add("dataChangeLastModifiedTime", dataChangeLastModifiedTime)
        .toString();
  }