src/CoreBundle/EventListener/DcGeneral/Table/DcaSettingCondition/ValueListener.php
public function setValueOptionsMultiple(ManipulateWidgetEvent $event)
    {
        if (!$this->wantToHandle($event)) {
            return;
        }

        if ($event->getModel()->getProperty('type') !== 'conditionpropertycontainanyof') {
            return;
        }

        $metaModel = $this->getMetaModel($event->getEnvironment());
        $attribute = $metaModel->getAttributeById($event->getModel()->getProperty('attr_id'));

        if (!($attribute && ($attribute->get('type') == 'tags'))) {
            return;
        }

        $event->getWidget()->multiple = true;
    }
public function setValueOptionsMultiple(ManipulateWidgetEvent $event)
    {
        if (!$this->wantToHandle($event)) {
            return;
        }

        if ($event->getModel()->getProperty('type') !== 'conditionpropertycontainanyof') {
            return;
        }

        $metaModel = $this->getMetaModel($event->getEnvironment());
        $attribute = $metaModel->getAttributeById($event->getModel()->getProperty('attr_id'));

        if (!($attribute && ($attribute->get('type') == 'tags'))) {
            return;
        }

        $event->getWidget()->multiple = true;
    }
Set the the value select to multiple.

@param ManipulateWidgetEvent $event The event.

@return void