/**
* @param integer $years
* @param integer $months
* @param integer $days
* @return TimeSpan
*/
public static function asDuration($years, $months = 0, $days = 0)
{
foreach (func_get_args() as $arg) {
Helpers::checkIfNotNegativeNumberOrThrowAnException($arg);
}
$newThis = new TimeSpan();
$newThis->newDateIntervalAbsolute($years, $months, $days);
return $newThis;
}
