code: def list_container_subdirs(self, container, limit=None, marker=None,
              prefix=None, delimiter=None, full_listing=False):
          
          return self._manager.list_subdirs(container, limit=limit,
                  marker=marker, prefix=prefix, delimiter=delimiter,
                  full_listing=full_listing)
docs: Although you cannot nest directories, you can simulate a hierarchical
          structure within a single container by adding forward slash characters
          (/) in the object name. This method returns a list of all of these
          pseudo-subdirectories in the specified container.