Alcaeus\MongoDbAdapter\Helper\WriteConcernConverter::createWriteConcernFromParameters PHP Method

    protected function createWriteConcernFromParameters($wstring, $wtimeout)
    {
        if (!is_string($wstring) && !is_int($wstring)) {
            trigger_error("w for WriteConcern must be a string or integer", E_WARNING);
            return false;
        }
        // Ensure wtimeout is not < 0
        return new \MongoDB\Driver\WriteConcern($wstring, max($wtimeout, 0));
    }