public List<Map.Entry<K, V>> toList() {
        return inner.collect(Collectors.toList());
    }
Accumulates all entries of this {@code MapStream} into a {@code List}.

<p>
The returned {@code List} is not concurrent.

@return  a {@code List} that contains all the entities of the stream
common-parent/mapstream/src/main/java/com/speedment/common/mapstream/MapStream.java