* 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))) {