Impact::getEndDatePlanGmt

public function getEndDatePlanGmt()
{
	if ((string)($this->data['END_DATE_PLAN'] ?? null) === '')
	{
		return null;
	}

	if ($this->endDatePlanGmt === null)
	{
		$date = $this->data['END_DATE_PLAN'];

		if ($date instanceof DateTime)
		{
			$date = $date->toString();
		}

		$this->endDatePlanGmt = DateTime::createFromUserTimeGmt($date); // string or object allowed here
	}

	return clone $this->endDatePlanGmt;
}