assertEquals("abacat", anyOf("ab").trimTrailingFrom("abacatbab"));
  }

  private void doTestTrimTrailingFrom(String in, String out) {
    // Try a few different matchers which all match '-' and not 'x'
    assertEquals(out, is('-').trimTrailingFrom(in));
    assertEquals(out, is('-').or(is('#')).trimTrailingFrom(in));
    assertEquals(out, isNot('x').trimTrailingFrom(in));

    assertEquals("abacat", anyOf("ab").trimTrailingFrom("abacatbab"));
  }

  private void doTestTrimTrailingFrom(String in, String out) {
    // Try a few different matchers which all match '-' and not 'x'
    assertEquals(out, is('-').trimTrailingFrom(in));
    assertEquals(out, is('-').or(is('#')).trimTrailingFrom(in));
    assertEquals(out, isNot('x').trimTrailingFrom(in));

   * the end of the string. For example:
   *
   * <pre>{@code
   * CharMatcher.anyOf("ab").trimTrailingFrom("abacatbab")
   * }</pre>
   *
   * ... returns {@code "abacat"}.
   */
  public String trimTrailingFrom(CharSequence sequence) {
    int len = sequence.length();
    for (int last = len - 1; last >= 0; last--) {
      if (!matches(sequence.charAt(last))) {