{"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"let"}]}
    let loop_expr = loop_kw.parent().and_then(ast::LoopExpr::cast)?;
    let loop_kw = ctx.find_token_syntax_at_offset(T![loop])?;
    if loop_expr.label().is_some() {