apollo-openapi/src/main/java/com/ctrip/framework/apollo/openapi/dto/OpenClusterDTO.java/OpenClusterDTO/toString
class OpenClusterDTO:  @Override
  public String toString() {
    return "OpenClusterDTO{" +
        "name='" + name + '\'' +
        ", appId='" + appId + '\'' +
        ", dataChangeCreatedBy='" + dataChangeCreatedBy + '\'' +
        ", dataChangeLastModifiedBy='" + dataChangeLastModifiedBy + '\'' +
        ", dataChangeCreatedTime=" + dataChangeCreatedTime +
        ", dataChangeLastModifiedTime=" + dataChangeLastModifiedTime +
        '}';
  }