PartKeepr\SiPrefixBundle\Entity\SiPrefix::setPrefix PHP Method

    public function setPrefix($prefix)
    {
        $this->prefix = $prefix;
    }

 /**
  * @Route("/setup/_int_create_si_prefixes")
  */
 public function intCreateSiPrefixes()
 {
     $response = array("success" => true, "errors" => [], "message" => "SI Prefixes successfully created/updated");
     $path = $this->get("kernel")->locateResource(self::SIPREFIX_PATH . self::SIPREFIX_DATA);
     try {
         $yaml = new Parser();
         $data = $yaml->parse(file_get_contents($path));
         $entityManager = $this->get("doctrine.orm.default_entity_manager");
         foreach ($data as $prefixName => $prefixData) {
             $prefix = $this->getSiPrefix($prefixName);
             if ($prefix === null) {
                 $prefix = new SiPrefix();
                 $prefix->setPrefix($prefixName);
                 $entityManager->persist($prefix);
             }
             $prefix->setExponent($prefixData["exponent"]);
             $prefix->setSymbol($prefixData["symbol"]);
             $prefix->setBase($prefixData["base"]);
         }
         $entityManager->flush();
     } catch (\Exception $e) {
         $response["success"] = false;
         $response["message"] = "SI Prefix creation error";
         $response["errors"] = [$e->getMessage()];
     }
     return new JsonResponse($response);
 }