{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"if"}]}
            if ty.needs_drop(cx.tcx, cx.typing_env()) {
            let ty = cx.typeck_results().expr_ty(expr);
                let sub = if let Ok(snippet) = cx.sess().source_map().span_to_snippet(expr.span) {