if (result == null) {
        result = Platform.preservesInsertionOrderOnPutsMap();
        builderMap = result;
      }
      return result;
    }

    ImmutableCollection.Builder<V> newValueCollectionBuilderWithExpectedSize(int expectedSize) {
      return ImmutableList.builderWithExpectedSize(expectedSize);
    }

    /**
     * Provides a hint for how many values will be associated with each key newly added to the