public boolean anyMatch(BiPredicate<? super K, ? super V> predicate) {
        requireNonNull(predicate);
        return inner.anyMatch(e -> predicate.test(e.getKey(), e.getValue()));
    }
Returns whether any key-value pairs of this stream match the provided
predicate. May not evaluate the predicate on all elements if not
necessary for determining the result. If the stream is empty then
{@code false} is returned and the predicate is not evaluated.
<p>
This is a short-circuiting terminal operation.

<p>
This method evaluates the <em>existential quantification</em> of the
predicate over the elements of the stream (for some x P(x)).

@param predicate  a non-interfering, stateless predicate to apply to 
                  key-value pairs of this stream
@return           {@code true} if any key-value pairs of the stream match 
                  the provided predicate, otherwise {@code false}
@throws NullPointerException if any of the provided parameters are {@code null}
common-parent/mapstream/src/main/java/com/speedment/common/mapstream/MapStream.java