def list_subdirs(self, container, marker=None, limit=None, prefix=None,
            delimiter=None, full_listing=False):
        """
        Returns a list of StorageObjects representing the pseudo-subdirectories
        in the specified container. You can use the marker and limit params to
        handle pagination, and the prefix param to filter the objects returned.
        The 'delimiter' parameter is ignored, as the only meaningful value is
        '/'.
        """
        mthd = container.list_all if full_listing else container.list
        objs = mthd(marker=marker, limit=limit, prefix=prefix, delimiter="/",
                return_raw=True)
        sdirs = [obj for obj in objs if "subdir" in obj]
        mgr = container.object_manager
        return [StorageObject(mgr, sdir) for sdir in sdirs]