Наследование: extends AbstractValidator
 /**
  * @test
  */
 public function parseReferenceDateSubstractsTimeIntervalCorrectlyUsingMonthAndMinuteForcingYearSwap()
 {
     $testResult = $this->accessibleValidator->_call('parseReferenceDate', 'P4MT15M/2013-02-01T13:00:00Z');
     $this->assertEquals('2012-10-01 12:45', $testResult->format('Y-m-d H:i'));
 }