Entity::addFilterCheckboxValue

private function addFilterCheckboxValue(array &$result, array $filter, $fieldId, array $field)
{
	if (isset($filter[$fieldId]))
	{
		$value = $filter[$fieldId];
		if ($value === 'Y' || $value === 'N')
		{
			$operator = $this->getFilterOperator($field, 'exact');
			if (is_string($operator))
				$fieldId = $operator.$fieldId;
			unset($operator);
			$this->addFilterItems($result, [$fieldId => $value], $field);
		}
		unset($value);
	}
}