{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
impl<'tcx> Visitor<'tcx> for MentionedItemsVisitor<'_, 'tcx> {
// will then be monomorphized later during "mentioned items" collection.
    fn visit_terminator(&mut self, terminator: &mir::Terminator<'tcx>, location: Location) {