protected function getFixtureContent()
 {
     return "<!--[if IE ]>\nFoo\nBar!<![endif]-->" . "\n" . parent::getFixtureContent();
 }
 protected function getFixtureContent()
 {
     return '<?xml version="1.0" encoding="UTF-8"?>' . parent::getFixtureContent();
 }
 protected function getFixtureContent()
 {
     return '<!--[if IE ]><![endif]-->' . "\n" . parent::getFixtureContent();
 }