docs: public List<HierarchicalEntityExtractor> listHierarchicalEntities(UUID appId, String versionId, ListHierarchicalEntitiesOptionalParameter listHierarchicalEntitiesOptionalParameter) {
          return listHierarchicalEntitiesWithServiceResponseAsync(appId, versionId, listHierarchicalEntitiesOptionalParameter).toBlocking().single().body();
      }