getValueObject('dateStart'); } public function setDateStart(?DateTimeOptional $dateStart): void { $this->setValueObject('dateStart', $dateStart); } public function getDateEnd(): ?DateTimeOptional { /** @var ?DateTimeOptional */ return $this->getValueObject('dateEnd'); } public function setDateEnd(?DateTimeOptional $dateEnd): void { $this->setValueObject('dateEnd', $dateEnd); } }