apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/entity/bo/ConfigBO.java/ConfigBO/ConfigBO
class ConfigBO:  public ConfigBO(Env env, String ownerName, String appId, String clusterName, NamespaceBO namespaceBO) {
    this(env, ownerName, appId, clusterName,
         namespaceBO.getBaseInfo().getNamespaceName(), namespaceBO.isPublic(),
         NamespaceBOUtils.convert2configFileContent(namespaceBO),
         ConfigFileFormat.fromString(namespaceBO.getFormat())
    );
  }