code: public static final <K,V> Stream<Entry<K,V>> stream(K key, NavigableMap<K,V> map, boolean parallel)
      {
          return StreamSupport.stream(spliterator(key, map), parallel);
      }
docs: Returns a stream that iterates all NavigableMap entries ascending starting from key and
  ending entry before key.
  @param <K>
  @param <V>
  @param key
  @param map
  @param parallel
  @return