ttl-core/src/main/java/com/alibaba/ttl3/TtlCallable.java [65:91]:
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        try {
            return callable.call();
        } finally {
            restore(backup);
        }
    }

    /**
     * return the original/underneath {@link Callable}.
     */
    @NonNull
    public Callable<V> getCallable() {
        return unwrap();
    }

    /**
     * unwrap to the original/underneath {@link Callable}.
     *
     * @see TtlWrappers#unwrap(Object)
     */
    @NonNull
    @Override
    public Callable<V> unwrap() {
        return callable;
    }

    @Override
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ttl2-compatible/src/main/java/com/alibaba/ttl/TtlCallable.java [64:91]:
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        try {
            return callable.call();
        } finally {
            restore(backup);
        }
    }

    /**
     * return the original/underneath {@link Callable}.
     */
    @NonNull
    public Callable<V> getCallable() {
        return unwrap();
    }

    /**
     * unwrap to the original/underneath {@link Callable}.
     *
     * @see TtlUnwrap#unwrap(Object)
     * @since 2.11.4
     */
    @NonNull
    @Override
    public Callable<V> unwrap() {
        return callable;
    }

    @Override
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