public FormStateInterface::getErrors()

The array of values as they were submitted by the user. These are raw and unvalidated, so should not be used without a thorough understanding

public FormState::getBuildInfo() Returns

public &FormStateInterface::getValue($key, $default = NULL)

public FormStateInterface::setError(array &$element, $message

public FormStateInterface::setProcessInput($process_input = TRUE)

public FormStateDecoratorBase::unsetValue($key)

Provides an interface for handling form errors. Hierarchy interface \Drupal\Core\Form\

public ConfirmFormBase::buildForm(array $form, FormStateInterface $

public FormBuilderInterface::getFormId($form_arg, FormStateInterface