apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/NamespaceBranchService.java/NamespaceBranchService/findBranchBaseInfo
class NamespaceBranchService:  public NamespaceDTO findBranchBaseInfo(String appId, Env env, String clusterName, String namespaceName) {
    return namespaceBranchAPI.findBranch(appId, env, clusterName, namespaceName);
  }