{"ast_node_type":"variable","tokens":[{"end":44,"kind":"keyword","start":0,"text":"let"}]}
    let let_stmt = LetStmt::cast(let_stmt)?;
        .or_else(|| ctx.find_token_syntax_at_offset(T![let])?.parent())?;
    let else_block = let_stmt.let_else()?.block_expr()?;