@Nullable
    public static <T> Callable<T> doAutoWrap(@Nullable final Callable<T> callable) {
        if (callable == null) return null;

        final TtlCallable<T> ret = TtlCallable.get(callable, false, true);

        // have been auto wrapped?
        if (ret != callable) setAutoWrapperAttachment(ret);

        return ret;
    }
Add {@code try-finally} logic to method.

@return the body code of method rewritten
ttl2-compatible/src/main/java/com/alibaba/ttl/threadpool/agent/transformlet/helper/TtlTransformletHelper.java