public static function remove_by_id($controllerinc_id)
 {
     return data_entry::remove_by_filter($table = 'controllerinc', $filter = array('controllerinc_id' => $controllerinc_id));
 }
 public static function remove_by_id($configuration_id)
 {
     return data_entry::remove_by_filter($table = 'configuration', $filter = array('configuration_id' => $configuration_id));
 }