/**
  * If UA starts with Mozilla, apply LD with tolerance 5.
  *
  * @param string $userAgent
  * @return string
  */
 public function applyConclusiveMatch($userAgent)
 {
     if (WURFL_Configuration_ConfigHolder::getWURFLConfig()->isHighPerformance()) {
         //High performance mode
         $tolerance = WURFL_Handlers_Utils::firstMatchOrLength($userAgent, ")");
         return $this->getDeviceIDFromRIS($userAgent, $tolerance);
     } else {
         //High accuracy mode
         return $this->getDeviceIDFromLD($userAgent, 5);
     }
 }