Function rustc_ty_utils::needs_drop::adt_drop_tys_helper

fn adt_drop_tys_helper(
    tcx: TyCtxt<'_>, 
    def_id: DefId, 
    adt_has_dtor: impl Fn(&AdtDef) -> bool
) -> Result<&List<Ty<'_>>, AlwaysRequiresDrop>