Function GrB_Vector_apply 

pub unsafe extern "C" fn GrB_Vector_apply(
    w: GrB_Vector,
    mask: GrB_Vector,
    accum: GrB_BinaryOp,
    op: GrB_UnaryOp,
    u: GrB_Vector,
    desc: GrB_Descriptor,
) -> GrB_Info