Function create_conical_gradient

pub fn create_conical_gradient<'c, 'input, Conn>(
    conn: &'c Conn,
    picture: Picture,
    center: Pointfix,
    angle: Fixed,
    stops: &'input [Fixed],
    colors: &'input [Color],
) -> Result<VoidCookie<'c, Conn>, ConnectionError>
where
    Conn: RequestConnection + ?Sized,