{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"|errors:"}]}
            |errors: &Vec<AmbiguityError<'_>>| errors.iter().filter(|error| !error.warning).count();
        let ambiguity_errors_len =
        let prev_ambiguity_errors_len = ambiguity_errors_len(&self.ambiguity_errors);