code: public static <K, V> HashMultimap<K, V> create(
        int expectedKeys, int expectedValuesPerKey) {
      return new HashMultimap<K, V>(expectedKeys, expectedValuesPerKey);
    }
docs: Constructs an empty {@code HashMultimap} with enough capacity to hold the
  specified numbers of keys and values without rehashing.
  
  @param expectedKeys the expected number of distinct keys
  @param expectedValuesPerKey the expected average number of values per key
  @throws IllegalArgumentException if {@code expectedKeys} or {@code
  expectedValuesPerKey} is negative