}
    }

    // In theory, wildcard rules are not restricted to having the wildcard in the leftmost position.
    // In practice, wildcards are always in the leftmost position. For now, this implementation
    // cheats and does not attempt every possible permutation. Instead, it only considers wildcards
    // in the leftmost position. We assert this fact when we generate the public suffix file. If

  }

  /**
   * Performs a lookup for the public suffix of the given labels, considering all public suffix
   * types. Returns the index of the leftmost label in the public suffix, or -1 if no match found.
   *
   * @param labels the domain labels, from left to right.
   * @return the index of the leftmost label in the public suffix, or -1 if not found.
   */
  public int findSuffixIndex(List<String> labels) {

   */
  private fun assertWildcardRule(rule: String) {
    check(rule.startsWith(WILDCARD_CHAR)) {
      """Wildcard Assertion Failure: '$rule'
A wildcard rule was added with a wildcard that is not in leftmost position! We'll need to change the ${PublicSuffixDatabase::class.java.name} to handle this."""
    }
    check(rule.indexOf(WILDCARD_CHAR, 1) == -1) {
      """Wildcard Assertion Failure: '$rule'