{{alias}}( str )
    Parses a string-serialized Slice object.

    The function returns `null` if provided an invalid string.

    Parameters
    ----------
    str: string
        Input string.

    Returns
    -------
    s: Slice|null
        Slice instance (or null).

    Examples
    --------
    > var s = new {{alias}}( 'Slice(1,10,1)' );
    > s.start
    1
    > s.stop
    10
    > s.step
    1
    > s = new {{alias}}( 'Slice(2,5,2)' );
    > s.start
    2
    > s.stop
    5
    > s.step
    2

    See Also
    --------