{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"&tokenstream::TokenTree::Token(Token"}]}
        &tokenstream::TokenTree::Token(Token { kind: token::Dollar, span: dollar_span }, _) => {
        // `tree` is a `$` token. Look at the next token in `trees`
            // FIXME: Handle `Invisible`-delimited groups in a more systematic way