{"ast_node_type":"function","tokens":[{"end":51,"kind":"keyword","start":0,"text":"fn"}]}
    fn visit_item(&mut self, item: &'a ast::Item) {
impl<'a, 'ra, 'tcx> Visitor<'a> for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx> {
        let def_id = self.r.local_def_id(item.id);