{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"lint_callback!(self,"}]}
        lint_callback!(self, check_fn, fk, span, id);
    fn visit_fn(&mut self, fk: ast_visit::FnKind<'ast>, span: Span, id: ast::NodeId) {
        ast_visit::walk_fn(self, fk);