PhpCsFixer\FixerFactory::registerFixer PHP Метод

    public function registerFixer(FixerInterface $fixer, $isCustom)
    {
        $name = $fixer->getName();
        if (isset($this->fixersByName[$name])) {
            throw new \UnexpectedValueException(sprintf('Fixer named "%s" is already registered.', $name));
        }
        if (!$this->nameValidator->isValid($name, $isCustom)) {
            throw new \UnexpectedValueException(sprintf('Fixer named "%s" has invalid name.', $name));
        }
        $this->fixers[] = $fixer;
        $this->fixersByName[$name] = $fixer;
        return $this;
    }

 public function testHasRuleWithChangedRuleSet()
 {
     $factory = new FixerFactory();
     $f1 = $this->createFixerMock('f1');
     $f2 = $this->createFixerMock('f2');
     $factory->registerFixer($f1);
     $factory->registerFixer($f2);
     $this->assertTrue($factory->hasRule('f1'), 'Should have f1 fixer');
     $this->assertTrue($factory->hasRule('f2'), 'Should have f2 fixer');
     $factory->useRuleSet(new RuleSet(array('f2' => true)));
     $this->assertFalse($factory->hasRule('f1'), 'Should not have f1 fixer');
     $this->assertTrue($factory->hasRule('f2'), 'Should have f2 fixer');
 }