//In plugin A
    public function beforeSurveySettings() {
        $this->event->set("surveysettings.{$this->id}", array(
            'name' => get_class($this),
            'settings' => array(
                'mySurveySetting'=> array(
                    'type'=>'info',
                    'content'=>'Something to test')),
                ),
            ),
        ));
    }
 
    public function newSurveySettings() {
        foreach ($this->event->get('settings') as $name => $value) {
            $this->set($name, $value, 'Survey', $this->event->get('survey'));
        }
    }
 
    //In plugin B
    public function beforeQuestionRender() {
        $oEvent=$this->getEvent();
        $sid = $oEvent->get('surveyId');
        $info = $this->get('mySurveySetting', 'Survey', $sid);
        //This should print "Something to test", but is NULL if called from another plugin
        var_dump($info);
    }

$oPluginA = new PluginA();
$info = $oPluginA->get('mySurveySetting', 'Survey', $sid);