Function GrB_Row_assign 

pub unsafe extern "C" fn GrB_Row_assign(
    C: GrB_Matrix,
    mask: GrB_Vector,
    accum: GrB_BinaryOp,
    u: GrB_Vector,
    i: GrB_Index,
    J: *const GrB_Index,
    nj: GrB_Index,
    desc: GrB_Descriptor,
) -> GrB_Info