has() public method

public has ( $parameterName )
 public function testRemoveParam()
 {
     $reference = new RouteReference('foo');
     $reference->set('foo', 'bar');
     $this->assertTrue($reference->has('foo'));
     $this->assertSame('bar', $reference->get('foo'));
     $reference->remove('foo');
     $this->assertFalse($reference->has('foo'));
 }
 public function testOnRouteReferenceGenerationNoTranslationSiteAccess()
 {
     $language = 'fre-FR';
     $routeReference = new RouteReference('foo', array('language' => $language));
     $event = new RouteReferenceGenerationEvent($routeReference, new Request());
     $this->translationHelper->expects($this->once())->method('getTranslationSiteAccess')->with($language)->will($this->returnValue(null));
     $listener = new LanguageSwitchListener($this->translationHelper);
     $listener->onRouteReferenceGeneration($event);
     $this->assertFalse($routeReference->has('language'));
     $this->assertFalse($routeReference->has('siteaccess'));
 }