Function GrB_Col_assign 

pub unsafe extern "C" fn GrB_Col_assign(
    C: GrB_Matrix,
    mask: GrB_Vector,
    accum: GrB_BinaryOp,
    u: GrB_Vector,
    I: *const GrB_Index,
    ni: GrB_Index,
    j: GrB_Index,
    desc: GrB_Descriptor,
) -> GrB_Info