{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
    let let_kw = ctx.find_token_syntax_at_offset(T![let])?;
pub(crate) fn replace_let_with_if_let(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
    let let_stmt = let_kw.parent().and_then(ast::LetStmt::cast)?;