public function testGetXmlNamespace()
 {
     $config = new Configuration();
     $config->addNamespace(self::XMLNS, 'Acme\\XsdTypes');
     $this->assertFalse($config->getXmlNamespace("FooDuck\\BarService"));
     $this->assertEquals(self::XMLNS, $config->getXmlNamespace('Acme\\XsdTypes\\Level1'));
     $this->assertEquals(self::XMLNS, $config->getXmlNamespace('Acme\\XsdTypes\\Level1\\Level2'));
     $this->assertEquals(self::XMLNS, $config->getXmlNamespace('Acme\\XsdTypes\\Level1\\Level2\\Level3'));
 }