{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
    let loop_kw = ctx.find_token_syntax_at_offset(T![loop])?;
pub(crate) fn add_label_to_loop(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
    let loop_expr = loop_kw.parent().and_then(ast::LoopExpr::cast)?;