NodeTypeForm::save

public NodeTypeForm::save(array $form, FormStateInterface $form_state)

public function save(array $form, FormStateInterface $form_state) {
  $type = $this->entity;
  $type->setNewRevision($form_state->getValue(array('options', 'revision')));
  $type->set('type', trim($type->id()));
  $type->set('name', trim($type->label()));

  $status = $type->save();

  $t_args = array('%name' => $type->label());

  if ($status == SAVED_UPDATED) {
    drupal_set_message(t('The content type %name has been updated.', $t_args));
  }
  elseif ($status == SAVED_NEW) {
    node_add_body_field($type);
    drupal_set_message(t('The content type %name has been added.', $t_args));
    $context = array_merge($t_args, array('link' => $type->link($this->t('View'), 'collection')));
    $this->logger('node')->notice('Added content type %name.', $context);
  }

  $fields = $this->entityManager->getFieldDefinitions('node', $type->id());
  // Update title field definition.
  $title_field = $fields['title'];
  $title_label = $form_state->getValue('title_label');
  if ($title_field->getLabel() != $title_label) {
    $title_field->getConfig($type->id())->setLabel($title_label)->save();
  }
  // Update workflow options.
  // @todo Make it possible to get default values without an entity.
  //   https://www.drupal.org/node/2318187
  $node = $this->entityManager->getStorage('node')->create(array('type' => $type->id()));
  foreach (array('status', 'promote', 'sticky') as $field_name) {
    $value = (bool) $form_state->getValue(['options', $field_name]);
    if ($node->$field_name->value != $value) {
      $fields[$field_name]->getConfig($type->id())->setDefaultValue($value)->save();
    }
  }

  $this->entityManager->clearCachedFieldDefinitions();
  $form_state->setRedirectUrl($type->urlInfo('collection'));
}