Import included plugin
Code is here : https://gitlab.com/Sondages.Pro/organizeSurvey

But quick copy paste

<?php
class testPlugin extends PluginBase
{
    static protected $description = 'A test plugin';
    static protected $name = 'testPlugin';

    public function init()
    {
        $this->subscribe('beforeToolsMenuRender');
    }

    /**
     * see beforeToolsMenuRender event
     *
     * @return void
     */
    public function beforeToolsMenuRender()
    {
        $event = $this->getEvent();
        $surveyId = $event->get('surveyId');
        $oSurvey = Survey::model()->findByPk($surveyId);
        $aMenuItem = array(
            'label' => 'PLUGIN test',
            'iconClass' => 'fa fa-server',
            'href' => Yii::app()->createUrl(
                'admin/pluginhelper',
                array(
                    'sa' => 'sidebody',
                    'plugin' => get_class($this),
                    'method' => 'actionSettings',
                    'surveyId' => $surveyId
                )
            ),
        );
        $menuItem = new \LimeSurvey\Menu\MenuItem($aMenuItem);
        $event->append('menuItems', array($menuItem));

    }
}