protected function addValues($values)
    {
        if (!is_array($values) && !$values instanceof \Traversable) {
            //Unable to process values
            return;
        }

        foreach ($values as $value) {
            //Passing every value thought the filter
            $value = $this->filterValue($value);
            if (!is_null($value)) {
                $this->values[] = $value;
            }
        }
    }