* MapSplitter mapSplitter = outerSplitter.withKeyValueSeparator(Splitter.on("->"));
   * Map<String, String> result = mapSplitter.split(toSplit);
   * assertThat(result).isEqualTo(ImmutableMap.of("x ", " y", "z", " a"));
   * }</pre>
   *
   * @since 10.0
   */
  public MapSplitter withKeyValueSeparator(Splitter keyValueSplitter) {
    return new MapSplitter(this, keyValueSplitter);
  }

   * MapSplitter mapSplitter = outerSplitter.withKeyValueSeparator(Splitter.on("->"));
   * Map<String, String> result = mapSplitter.split(toSplit);
   * assertThat(result).isEqualTo(ImmutableMap.of("x ", " y", "z", " a"));
   * }</pre>
   *
   * @since 10.0
   */
  public MapSplitter withKeyValueSeparator(Splitter keyValueSplitter) {
    return new MapSplitter(this, keyValueSplitter);
  }