@Override
    public Optional<Map.Entry<K, V>> findAny() {
        return inner.findAny();
    }
Returns an {@link Optional} describing some element of the stream, or an
empty {@code Optional} if the stream is empty.
<p>
This is a short-circuiting terminal operation.
<p>
The behavior of this operation is explicitly nondeterministic; it is
free to select any element in the stream.  This is to allow for maximal
performance in parallel operations; the cost is that multiple invocations
on the same source may not return the same result.  (If a stable result
is desired, use {@link #findFirst()} instead.)

@return  an {@code Optional} describing some element of this stream, or an
         empty {@code Optional} if the stream is empty

@throws NullPointerException if the element selected is null
@see #findFirst()
common-parent/mapstream/src/main/java/com/speedment/common/mapstream/MapStream.java