private function prepare_label_addition($object_to_prepare_for, $setting)
{
if ('' !== ($field_label_addition = $object_to_prepare_for->get_setting('field_label_' . $setting, ''))) {
if ($setting == 'prefix') {
$new_label = $field_label_addition . ' - ' . $this->get_setting('label');
} else {
$new_label = $this->get_setting('label') . ' - ' . $field_label_addition;
}
$this->set_setting('label', $new_label);
}
}