{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"//"}]}
        // FIXME(where_clause_attrs): Currently, as the following check shows,
    fn visit_where_predicate(&mut self, where_predicate: &'tcx hir::WherePredicate<'tcx>) {
        // only `#[cfg]` and `#[cfg_attr]` are allowed, but it should be removed