{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"ExpandErrorKind::UnexpectedToken"}]}
            ExpandErrorKind::UnexpectedToken => f.write_str("unexpected token in input"),
            ExpandErrorKind::NoMatchingRule => f.write_str("no rule matches input tokens"),
            ExpandErrorKind::BindingError(e) => f.write_str(e),