code: def list_subdirs(self, marker=None, limit=None, prefix=None, delimiter=None,
              full_listing=False):
          
          return self.manager.list_subdirs(self, marker=marker, limit=limit,
                  prefix=prefix, delimiter=delimiter, full_listing=full_listing)
docs: Return a list of the namesrepresenting the pseudo-subdirectories in
          this container. You can use the marker and limit params to handle
          pagination, and the prefix param to filter the objects returned. The
          delimiter param is there for backwards compatibility only, as the call
          requires the delimiter to be '/'.