/**
  * Create a new translatable email
  * 
  * @param DBObject $context
  * @param string $translation_id
  * @param array $variables
  * 
  * @return TranslatableEmail
  */
 public static function create($translation_id, $variables)
 {
     $email = new self();
     // Get translation data and variables
     $email->translation_id = $translation_id;
     $email->variables = array();
     if ($variables) {
         foreach ($variables as $k => $v) {
             // Convert DBObject types to type/id pairs for saving
             if ($v instanceof DBObject) {
                 $v = array('dbobject_type' => get_class($v), 'dbobject_id' => $v->id);
             }
             $email->variables[$k] = $v;
         }
     }
     // Add meta
     $email->created = time();
     // Generate token until it is indeed unique
     $email->token = Utilities::generateUID(function ($token) {
         $statement = DBI::prepare('SELECT * FROM ' . TranslatableEmail::getDBTable() . ' WHERE token = :token');
         $statement->execute(array(':token' => $token));
         $data = $statement->fetch();
         return !$data;
     });
     $email->save();
     return $email;
 }