ttl-core/src/main/java/com/alibaba/ttl3/executor/TtlExecutors.java [286:327]:
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    @Nullable
    @Contract(value = "null -> null; !null -> !null", pure = true)
    public static Comparator<Runnable> getTtlRunnableUnwrapComparator(@Nullable Comparator<Runnable> comparator) {
        if (comparator == null || isTtlRunnableUnwrapComparator(comparator)) return comparator;

        return new TtlUnwrapComparator<>(comparator);
    }

    @SuppressWarnings({"unchecked", "rawtypes"})
    private static final Comparator INSTANCE = new TtlUnwrapComparator(ComparableComparator.INSTANCE);

    /**
     * {@code TtlRunnableUnwrapComparator} that compares {@link Comparable Comparable} objects.
     *
     * @see #getTtlRunnableUnwrapComparator(Comparator)
     */
    @NonNull
    @SuppressWarnings("unchecked")
    public static Comparator<Runnable> getTtlRunnableUnwrapComparatorForComparableRunnable() {
        return (Comparator<Runnable>) INSTANCE;
    }

    /**
     * check the {@code Comparator<Runnable>} is a wrapper {@code TtlRunnableUnwrapComparator} or not.
     *
     * @see #getTtlRunnableUnwrapComparator(Comparator)
     * @see #getTtlRunnableUnwrapComparatorForComparableRunnable()
     */
    public static boolean isTtlRunnableUnwrapComparator(@Nullable Comparator<Runnable> comparator) {
        return comparator instanceof TtlUnwrapComparator;
    }

    /**
     * Unwrap {@code TtlRunnableUnwrapComparator} to the original/underneath {@code Comparator<Runnable>}.
     *
     * @see #getTtlRunnableUnwrapComparator(Comparator)
     * @see #getTtlRunnableUnwrapComparatorForComparableRunnable()
     * @see #isTtlRunnableUnwrapComparator(Comparator)
     * @see com.alibaba.ttl3.TtlWrappers#unwrap(Object)
     */
    @Nullable
    @Contract(value = "null -> null; !null -> !null", pure = true)
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ttl2-compatible/src/main/java/com/alibaba/ttl/threadpool/TtlExecutors.java [250:294]:
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    @Nullable
    @Contract(value = "null -> null; !null -> !null", pure = true)
    public static Comparator<Runnable> getTtlRunnableUnwrapComparator(@Nullable Comparator<Runnable> comparator) {
        if (comparator == null || isTtlRunnableUnwrapComparator(comparator)) return comparator;

        return new TtlUnwrapComparator<>(comparator);
    }

    @SuppressWarnings({"unchecked", "rawtypes"})
    private static final Comparator INSTANCE = new TtlUnwrapComparator(ComparableComparator.INSTANCE);

    /**
     * {@code TtlRunnableUnwrapComparator} that compares {@link Comparable Comparable} objects.
     *
     * @see #getTtlRunnableUnwrapComparator(Comparator)
     * @since 2.12.3
     */
    @NonNull
    @SuppressWarnings("unchecked")
    public static Comparator<Runnable> getTtlRunnableUnwrapComparatorForComparableRunnable() {
        return (Comparator<Runnable>) INSTANCE;
    }

    /**
     * check the {@code Comparator<Runnable>} is a wrapper {@code TtlRunnableUnwrapComparator} or not.
     *
     * @see #getTtlRunnableUnwrapComparator(Comparator)
     * @see #getTtlRunnableUnwrapComparatorForComparableRunnable()
     * @since 2.12.3
     */
    public static boolean isTtlRunnableUnwrapComparator(@Nullable Comparator<Runnable> comparator) {
        return comparator instanceof TtlUnwrapComparator;
    }

    /**
     * Unwrap {@code TtlRunnableUnwrapComparator} to the original/underneath {@code Comparator<Runnable>}.
     *
     * @see #getTtlRunnableUnwrapComparator(Comparator)
     * @see #getTtlRunnableUnwrapComparatorForComparableRunnable()
     * @see #isTtlRunnableUnwrapComparator(Comparator)
     * @see com.alibaba.ttl.TtlUnwrap#unwrap(Object)
     * @since 2.12.3
     */
    @Nullable
    @Contract(value = "null -> null; !null -> !null", pure = true)
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