class FormDataCollector extends

array extractViewVariables(FormView $view)

collectSubmittedData(FormInterface $form)

array extractDefaultData(FormInterface $form)

class DataCollectorExtension extends

buildFinalFormTree(FormInterface $form,

collectSubmittedData(FormInterface $form)

interface FormDataCollectorInterface implements

string getName() Returns the name of the collector.

buildPreliminaryFormTree(FormInterface $form)