protected function to()
{
if (static::$to === 1) {
$method = 'renderAsArray';
} elseif (static::$to === 2) {
$method = 'renderAsJson';
} elseif (static::$to === 3) {
$method = 'renderAsHtml';
} elseif (static::$to === 4) {
$method = 'renderAsDropdown';
} else {
return $this->source;
}
$nest = new NestableService();
$nest->save(static::$parameters);
$nestable = $nest->make($this->source);
static::$nested = false;
return call_user_func([$nestable, $method]);
}