{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
            // Proactively check whether parsing the field will be incorrect.
            let is_shorthand = !this.look_ahead(1, |t| t == &token::Colon || t == &token::Eq);
            let is_wrong = this.token.is_non_reserved_ident()