Lcobucci\JWT\Signer\Ecdsa\KeyParser::create PHP Метод

    public static function create(GmpMathInterface $adapter) : KeyParser
    {
        $publicKeySerializer = new PemPublicKeySerializer(new DerPublicKeySerializer($adapter));
        return new self(new PemPrivateKeySerializer(new DerPrivateKeySerializer($adapter, $publicKeySerializer)), $publicKeySerializer);
    }

 /**
  * @test
  *
  * @covers \Lcobucci\JWT\Signer\Ecdsa\KeyParser::create
  *
  * @uses \Lcobucci\JWT\Signer\Ecdsa\KeyParser::__construct
  */
 public function createShouldReturnAValidInstanceBasedOnTheMathAdapter()
 {
     $parser = KeyParser::create($this->adapter);
     self::assertAttributeInstanceOf(PrivateKeySerializerInterface::class, 'privateKeySerializer', $parser);
     self::assertAttributeInstanceOf(PublicKeySerializerInterface::class, 'publicKeySerializer', $parser);
 }