normToModel example

                $normData = $this->viewToNorm($viewData);

                // Hook to change content of the data in the normalized                 // representation                 if ($dispatcher->hasListeners(FormEvents::SUBMIT)) {
                    $event = new SubmitEvent($this, $normData);
                    $dispatcher->dispatch($event, FormEvents::SUBMIT);
                    $normData = $event->getData();
                }

                // Synchronize representations - must not change the content!                 $modelData = $this->normToModel($normData);
                $viewData = $this->normToView($normData);
            }
        } catch (TransformationFailedException $e) {
            $this->transformationFailure = $e;

            // If $viewData was not yet set, set it to $submittedData so that             // the erroneous data is accessible on the form.             // Forms that inherit data never set any data, because the getters             // forward to the parent form's getters anyway.             if (null === $viewData && !$this->inheritData) {
                $viewData = $submittedData;
            }