{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"root.syntax().descendants().flat_map(ast::BlockExpr::cast).nth(1).unwrap();"}]}
            root.syntax().descendants().flat_map(ast::BlockExpr::cast).nth(1).unwrap();
        let inner_block =
        let second_let = root.syntax().descendants().find_map(ast::LetStmt::cast).unwrap();