docs: def list_resources(self, lang):
          """Return a sequence of resources for a given lang.
  
          Each Resource is a dict containing the slug, name, i18n_type,
          source_language_code and the category.
          """
  
          return registry.registry.http_handler.get(
              '/api/2/project/%s/resources/' % (
                  self.get_project_slug(lang),)
          )