Function GxB_Vector_pack_Bitmap 

pub unsafe extern "C" fn GxB_Vector_pack_Bitmap(
    v: GrB_Vector,
    vb: *mut *mut i8,
    vx: *mut *mut c_void,
    vb_size: GrB_Index,
    vx_size: GrB_Index,
    iso: bool,
    nvals: GrB_Index,
    desc: GrB_Descriptor,
) -> GrB_Info