{"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"let"}]}
            let sig = tcx.instantiate_bound_regions_with_erased(sig);
            let sig = tcx.fn_sig(drop_fn_def_id).instantiate(tcx, trait_args);
            (sig.output(), drop_fn_def_id, trait_args)