pub unsafe extern "C" fn GxB_Vector_Iterator_attach(
iterator: GxB_Iterator,
v: GrB_Vector,
desc: GrB_Descriptor,
) -> GrB_Infopub unsafe extern "C" fn GxB_Vector_Iterator_attach(
iterator: GxB_Iterator,
v: GrB_Vector,
desc: GrB_Descriptor,
) -> GrB_Info