/**
* Get or set the pending `Content-Type` header (with `nosniff`).
* @param string $type
* @return string|null
*/
public static function type($type = null)
{
if (isset($type)) {
self::$headers['Content-Type'] = $type;
self::$headers['X-Content-Type-Options'] = 'nosniff';
return $type;
}
return X::elem(self::$headers, 'Content-Type');
}