Inheritance: extends Datastore
 /**
  * Load complex field value(s) from the database.
  *
  * @param mixed $field The field to load values for.
  */
 public function load_values($field)
 {
     $results = parent::load_values($field);
     if (!$results && is_object($field)) {
         $tmp_field = clone $field;
         $tmp_field->set_value_from_input();
         $values = $tmp_field->get_values();
         foreach ($values as $single_value) {
             foreach ($single_value as $value_field) {
                 $results[] = array('field_key' => $value_field->get_name(), 'field_value' => $value_field->get_value());
             }
         }
     }
     return $results;
 }