{"ast_node_type":"variable","tokens":[{"end":87,"kind":"keyword","start":0,"text":"if"}]}
            if let [tt::TokenTree::Leaf(tt)] = subtree_iter.remaining().flat_tokens() {
        if let TtElement::Subtree(subtree, subtree_iter) = &t {
                if subtree.delimiter.kind == tt::DelimiterKind::Parenthesis {