InvoiceSumStatisticEntry::resolveEntityBillDate

static function resolveEntityBillDate(array $entityFields, Date $defaultDate = null)
{
	$date = null;
	if(isset($entityFields['DATE_BILL']))
	{
		$date = \CCrmDateTimeHelper::ParseDateString($entityFields['DATE_BILL']);
	}
	if($date === null && isset($entityFields['DATE_INSERT']))
	{
		$date = \CCrmDateTimeHelper::ParseDateString($entityFields['DATE_INSERT']);
	}
	return $date !== null ? $date : ($defaultDate !== null ? $defaultDate : new Date());
}