{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
            let (drop_trait, trait_args) = match tcx.codegen_select_candidate(
                ty::TraitRef::new(tcx, tcx.require_lang_item(LangItem::AsyncDrop, span), [drop_ty]);
                ty::TypingEnv::fully_monomorphized().as_query_input(trait_ref),