Method __toString

/**
 * Magic method to convert the object to JSON string representation.
 *
 * @return  string  JSON representation of the actions array
 *
 * @since   1.7.0
 */
public function __toString()
{
    $temp = array();
    foreach ($this->data as $name => $rule) {
        if ($data = $rule->getData()) {
            $temp[$name] = $data;
        }
    }
    return json_encode($temp, JSON_FORCE_OBJECT);
}