Bitrix how to make the GETLIST component display elements with a certain custom field property?

Question

1C-Bitrix

$filter = [
           IBLOCK_ID' => 18, 'SECTION_ID' => $arFloor['ID'], 'PROPERTY_COUNT' => $roomsCount
];

how to correctly write a condition in the filter to display elements with a custom field checkbox "sold" -> "yes"

Answer 1

"!PROPERTY_PRODANO" => false