Function xsytrs_buffer_size 

pub fn xsytrs_buffer_size<TA: DataTypeLike, TB: DataTypeLike>(
    ctx: &Context,
    fill_mode: FillMode,
    n: usize,
    nrhs: usize,
    a: MatrixRef<'_, TA>,
    pivots: Option<&DeviceMemory<i64>>,
    b: MatrixRef<'_, TB>,
) -> Result<WorkspaceSizes>