{"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"let"}]}
        let crate_id = self.owner.module(self.db).krate();
    fn resolve_lang_item(&self, item: LangItem) -> Result<LangItemTarget> {
        lang_item(self.db, crate_id, item).ok_or(MirLowerError::LangItemNotFound(item))