Function rustc_mir::transform::check_unsafety::is_enclosed

pub(in transform::check_unsafety) fn is_enclosed(
    tcx: TyCtxt<'_>, 
    used_unsafe: &FxHashSet<HirId>, 
    id: HirId
) -> Option<(String, HirId)>

Returns the HirId for an enclosing scope that is also unsafe.