{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"ExpandErrorKind::UnresolvedBinding(binding)"}]}
            ExpandErrorKind::UnresolvedBinding(binding) => {
            ExpandErrorKind::BindingError(e) => f.write_str(e),
                f.write_str("could not find binding ")?;