Statistic::addAction

public function addAction(array $fields)
{
	$r = $this->checkProviderById($fields['PROVIDER_ID']);
	if($r->isSuccess())
	{
		$r = parent::add($fields);
		if($r->isSuccess())
		{
			return ['STATISTIC'=>$this->get($r->getPrimary())];
		}
	}

	$this->addErrors($r->getErrors());
	return null;
}