code: public function getDomainCacheRuleTaskProperties($domain, $ruleId, $taskId)
      {
          return json_decode(self::getClient()->getDomainCacheRuleTaskProperties($this->sn, $domain, $ruleId, $taskId));
      }
docs: Return properties of task $taskId associated with rule $ruleId of domain $domain
  
  @param $domain
  @param $ruleId
  @param $taskId
  @return mixed