{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"ExpandErrorKind::BindingError(e)"}]}
            ExpandErrorKind::BindingError(e) => f.write_str(e),
            ExpandErrorKind::UnexpectedToken => f.write_str("unexpected token in input"),
            ExpandErrorKind::UnresolvedBinding(binding) => {