tester.testAllPublicInstanceMethods(COMMA_SPLITTER);
    tester.testAllPublicInstanceMethods(COMMA_SPLITTER.trimResults());
  }

  public void testMapSplitter_trimmedBoth() {
    Map<String, String> m =
        COMMA_SPLITTER
            .trimResults()
            .withKeyValueSeparator(Splitter.on(':').trimResults())
            .split("boy  : tom , girl: tina , cat  : kitty , dog: tommy ");

   * substring; equivalent to {@code trimResults(CharMatcher.whitespace())}. For example, {@code
   * Splitter.on(',').trimResults().split(" a, b ,c ")} returns an iterable containing {@code ["a",
   * "b", "c"]}.
   *
   * @return a splitter with the desired configuration
   */
  public Splitter trimResults() {
    return trimResults(CharMatcher.whitespace());
  }

  /**