private GetNamespaceResponse loadNamespace(Map<String, String> vars) {
    if (asNamespaceCatalog != null) {
      Namespace namespace = namespaceFromPathVars(vars);
      return castResponse(
              GetNamespaceResponse.class, CatalogHandlers.loadNamespace(asNamespaceCatalog, namespace));
    }
    throw new NamespaceNotSupported(catalog.toString());
  }
@param apis an optional list of known api call names
@return the list of metric names for the HMSCatalog class
standalone-metastore/metastore-rest-catalog/src/main/java/org/apache/iceberg/rest/HMSCatalogAdapter.java