code: public static <K, V> HashMap<K, V> sizedHashMap(final int size) {
          return new HashMap<K, V>(size);
      }
docs: Returns a hash map of type {@code K, V} with initial capacity
  {@code size}.
  <p>
  Use sized hash maps when the capacity of a hash map is known to be
  greater than sixteen (the default initial capacity). The hash map
  implementation will automatically adjust the size to the next nearest
  power of two.
  </p>
  
  @param <K> Formal type parameter key
  @param <V> Formal type parameter value
  @param size Hash map initial capacity
  @return Hash map of type {@code K, V}