def storageinfo(exclusivefiles=False, sharedfiles=False, revisionscount=
    False, trackedsize=False, storedsize=False):
    """Obtain information about storage for this file's data.

        Returns a dict describing storage for this tracked path. The keys
        in the dict map to arguments of the same. The arguments are bools
        indicating whether to calculate and obtain that data.

        exclusivefiles
           Iterable of (vfs, path) describing files that are exclusively
           used to back storage for this tracked path.

        sharedfiles
           Iterable of (vfs, path) describing files that are used to back
           storage for this tracked path. Those files may also provide storage
           for other stored entities.

        revisionscount
           Number of revisions available for retrieval.

        trackedsize
           Total size in bytes of all tracked revisions. This is a sum of the
           length of the fulltext of all revisions.

        storedsize
           Total size in bytes used to store data for all tracked revisions.
           This is commonly less than ``trackedsize`` due to internal usage
           of deltas rather than fulltext revisions.

        Not all storage backends may support all queries are have a reasonable
        value to use. In that case, the value should be set to ``None`` and
        callers are expected to handle this special value.
        """
