}

  /**
   * Returns the platform preferred map implementation that preserves insertion order when used only
   * for insertions.
   */
  static <K, V> Map<K, V> preservesInsertionOrderOnPutsMap() {
    return Maps.newLinkedHashMap();
  }

  /**
   * Returns the platform preferred set implementation that preserves insertion order when used only
   * for insertions.
   */

   * Returns the platform preferred map implementation that preserves insertion order when used only
   * for insertions.
   */
  static <K extends @Nullable Object, V extends @Nullable Object>
      Map<K, V> preservesInsertionOrderOnPutsMap() {
    return CompactHashMap.create();
  }

  /**
   * Returns the platform preferred set implementation that preserves insertion order when used only
   * for insertions.
   */

    /**
     * Creates a new builder. The returned builder is equivalent to the builder generated by {@link
     * ImmutableMultimap#builder}.
     */
    public Builder() {
      this.builderMap = Platform.preservesInsertionOrderOnPutsMap();
    }

    Collection<V> newMutableValueCollection() {
      return new ArrayList<>();
    }

    /** Adds a key-value mapping to the built multimap. */
    @CanIgnoreReturnValue

    /**
     * Creates a new builder. The returned builder is equivalent to the builder generated by {@link
     * ImmutableMultimap#builder}.
     */
    public Builder() {
      this.builderMap = Platform.preservesInsertionOrderOnPutsMap();
    }

    Collection<V> newMutableValueCollection() {
      return new ArrayList<>();
    }

    /** Adds a key-value mapping to the built multimap. */
    @CanIgnoreReturnValue