protected function takeChildFromDOM($child)
 {
     $absoluteNodeName = $child->namespaceURI . ':' . $child->localName;
     switch ($absoluteNodeName) {
         case $this->lookupNamespace('apps') . ':' . 'login':
             $login = new Zend_Gdata_Gapps_Extension_Login();
             $login->transferFromDOM($child);
             $this->_login = $login;
             break;
         case $this->lookupNamespace('apps') . ':' . 'name':
             $name = new Zend_Gdata_Gapps_Extension_Name();
             $name->transferFromDOM($child);
             $this->_name = $name;
             break;
         case $this->lookupNamespace('apps') . ':' . 'quota':
             $quota = new Zend_Gdata_Gapps_Extension_Quota();
             $quota->transferFromDOM($child);
             $this->_quota = $quota;
             break;
         case $this->lookupNamespace('gd') . ':' . 'feedLink':
             $feedLink = new Zend_Gdata_Extension_FeedLink();
             $feedLink->transferFromDOM($child);
             $this->_feedLink[] = $feedLink;
             break;
         default:
             parent::takeChildFromDOM($child);
             break;
     }
 }

 protected function takeChildFromDOM($child)
 {
     $absoluteNodeName = $child->namespaceURI . ':' . $child->localName;
     switch ($absoluteNodeName) {
         case $this->lookupNamespace('apps') . ':' . 'login':
             $login = new Zend_Gdata_Gapps_Extension_Login();
             $login->transferFromDOM($child);
             $this->_login = $login;
             break;
         case $this->lookupNamespace('apps') . ':' . 'nickname':
             $nickname = new Zend_Gdata_Gapps_Extension_Nickname();
             $nickname->transferFromDOM($child);
             $this->_nickname = $nickname;
             break;
         default:
             parent::takeChildFromDOM($child);
             break;
     }
 }

 public function testExtensionAttributes()
 {
     $extensionAttributes = $this->login->extensionAttributes;
     $extensionAttributes['foo1'] = array('name' => 'foo1', 'value' => 'bar');
     $extensionAttributes['foo2'] = array('name' => 'foo2', 'value' => 'rab');
     $this->login->extensionAttributes = $extensionAttributes;
     $this->assertEquals('bar', $this->login->extensionAttributes['foo1']['value']);
     $this->assertEquals('rab', $this->login->extensionAttributes['foo2']['value']);
     $loginXml = $this->login->saveXML();
     $newLogin = new Zend_Gdata_Gapps_Extension_Login();
     $newLogin->transferFromXML($loginXml);
     $this->assertEquals('bar', $newLogin->extensionAttributes['foo1']['value']);
     $this->assertEquals('rab', $newLogin->extensionAttributes['foo2']['value']);
 }