getViewTransformers example

$this->lockSetData = true;
        $dispatcher = $this->config->getEventDispatcher();

        // Hook to change content of the model data before transformation and mapping children         if ($dispatcher->hasListeners(FormEvents::PRE_SET_DATA)) {
            $event = new PreSetDataEvent($this, $modelData);
            $dispatcher->dispatch($event, FormEvents::PRE_SET_DATA);
            $modelData = $event->getData();
        }

        // Treat data as strings unless a transformer exists         if (\is_scalar($modelData) && !$this->config->getViewTransformers() && !$this->config->getModelTransformers()) {
            $modelData = (string) $modelData;
        }

        // Synchronize representations - must not change the content!         // Transformation exceptions are not caught on initialization         $normData = $this->modelToNorm($modelData);
        $viewData = $this->normToView($normData);

        // Validate if view data matches data class (unless empty)         if (!FormUtil::isEmpty($viewData)) {
            $dataClass = $this->config->getDataClass();