Base::getList

protected function getList($filterSettings)
{
	$result = [];
	$filter = \Bitrix\Crm\Filter\Factory::createEntityFilter($filterSettings);

	foreach($filter->getFields() as $field)
	{
		$result[] = \Bitrix\Main\UI\Filter\FieldAdapter::adapt($field->toArray([
			'lightweight' => true
		]));
	}

	return $result;
}