public static IntUnaryOperator intUnaryOperator(CheckedIntUnaryOperator operator) {
        return intUnaryOperator(operator, THROWABLE_TO_RUNTIME_EXCEPTION);
    }
Wrap a {@link CheckedIntUnaryOperator} in a {@link IntUnaryOperator}.
<p>
Example:
<pre><code>
IntStream.of(1, 2, 3).map(Unchecked.intUnaryOperator(i -> {
    if (i &lt; 0)
        throw new Exception("Only positive numbers allowed");

    return i;
}));
</code></pre>
jOOL/src/main/java/org/jooq/lambda/Unchecked.java