@Nullable
    @Contract(value = "null -> null; !null -> !null", pure = true)
    public static ThreadFactory unwrapDisableInheritableThreadFactory(@Nullable ThreadFactory threadFactory) {
        if (!isDisableInheritableThreadFactory(threadFactory)) return threadFactory;

        return ((DisableInheritableThreadFactoryWrapper) threadFactory).unwrap();
    }
Unwrap {@code DisableInheritableThreadFactory} to the original/underneath one.

@see #getDisableInheritableThreadFactory(ThreadFactory)
@see #getDefaultDisableInheritableThreadFactory()
@see #isDisableInheritableThreadFactory(ThreadFactory)
@see TtlExecutors#unwrapDisableInheritableForkJoinWorkerThreadFactory(ForkJoinWorkerThreadFactory)
@see com.alibaba.ttl3.TtlWrappers#unwrap(Object)
ttl-core/src/main/java/com/alibaba/ttl3/executor/TtlExecutors.java