ImageInput::getMorePhotoPropertyId

private function getMorePhotoPropertyId(): ?int
{
	if ($this->morePhotoPropertyId === null)
	{
		$this->morePhotoPropertyId = 0;
		$propertyRaw = BitrixIblockPropertyTable::getList([
			'select' => ['ID'],
			'filter' => [
				'=IBLOCK_ID' => $this->getIblockId(),
				'=ACTIVE' => 'Y',
				'=CODE' => MorePhotoImage::CODE,
			],
			'limit' => 1,
			'cache' => [
				'ttl' => 86400,
			],
		]);

		if ($morePhotoProperty = $propertyRaw->fetch())
		{
			$this->morePhotoPropertyId = $morePhotoProperty['ID'];
		}
	}

	return $this->morePhotoPropertyId;
}