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class OldSelector {  constructor(selector, prefix) {    this.prefix = prefix;    this.prefixed = selector.prefixed(this.prefix);    this.regexp = selector.regexp(this.prefix);
    this.prefixeds = selector      .possible()      .map((x) => [selector.prefixed(x), selector.regexp(x)]);
    this.unprefixed = selector.name;    this.nameRegexp = selector.regexp();  }
  /**   * Is rule a hack without unprefixed version bottom   */  isHack(rule) {    let index = rule.parent.index(rule) + 1;    let rules = rule.parent.nodes;
    while (index < rules.length) {      let before = rules[index].selector;      if (!before) {        return true;      }
      if (before.includes(this.unprefixed) && before.match(this.nameRegexp)) {        return false;      }
      let some = false;      for (let [string, regexp] of this.prefixeds) {        if (before.includes(string) && before.match(regexp)) {          some = true;          break;        }      }
      if (!some) {        return true;      }
      index += 1;    }
    return true;  }
  /**   * Does rule contain an unnecessary prefixed selector   */  check(rule) {    if (!rule.selector.includes(this.prefixed)) {      return false;    }    if (!rule.selector.match(this.regexp)) {      return false;    }    if (this.isHack(rule)) {      return false;    }    return true;  }}
export default OldSelector;