Code of plugin

<?php
/**
 * CheckDebug 1 
 */
class CheckDebug extends PluginBase
{
    protected static $description = 'Check debug 1 : too test plugin : set debug 1 on config and load settings : no error must happen (deprecated function call)';
    protected static $name = 'CheckDebug';

    /** The settings : update in beforeSurveySettings **/
    protected $settings = array(
        'isDebug' => array(
            'type'=>'info',
            'content'=>'OK',
        )
    );

    /**
     * @see getPluginSettings
     */
    public function getPluginSettings($getValues = true)
    {
        str_contains('foobar', null);
        return parent::getPluginSettings($getValues);
    }
}