code: protected function createRules()
      {
          $rules = [];
          foreach ($this->rules as $key => $rule) {
              if (!is_array($rule)) {
                  $verbs = 'GET|HEAD|POST|PUT|PATCH|DELETE|OPTIONS';
                  $verb = null;
                  if (preg_match("/^((?:(?:$verbs),)*(?:$verbs))\\s+(.*)$/", $key, $matches)) {
                      $verb = explode(',', $matches[1]);
                      $key = $matches[2];
                  }
                  $rule = [
                      'pattern' => ltrim($this->prefix . '/' . $key, '/'),
                      'route' => ltrim($this->routePrefix . '/' . $rule, '/'),
                      'verb' => $verb
                  ];
              } elseif (isset($rule['pattern'], $rule['route'])) {
                  $rule['pattern'] = ltrim($this->prefix . '/' . $rule['pattern'], '/');
                  $rule['route'] = ltrim($this->routePrefix . '/' . $rule['route'], '/');
              }
  
              $rule = Yii::createObject(array_merge($this->ruleConfig, $rule));
              if (!$rule instanceof UrlRuleInterface) {
                  throw new InvalidConfigException('URL rule class must implement UrlRuleInterface.');
              }
              $rules[] = $rule;
          }
  
          return $rules;
      }
docs: {@inheritdoc}