UpdateManagerUpdate::submitForm

public UpdateManagerUpdate::submitForm(array &$form, FormStateInterface $form_state)

public function submitForm(array &$form, FormStateInterface $form_state) {
  $this->moduleHandler->loadInclude('update', 'inc', 'update.manager');
  $projects = array();
  foreach (array('projects', 'disabled_projects') as $type) {
    if (!$form_state->isValueEmpty($type)) {
      $projects = array_merge($projects, array_keys(array_filter($form_state->getValue($type))));
    }
  }
  $operations = array();
  foreach ($projects as $project) {
    $operations[] = array(
      'update_manager_batch_project_get',
      array(
        $project,
        $form_state->getValue(array('project_downloads', $project)),
      ),
    );
  }
  $batch = array(
    'title' => $this->t('Downloading updates'),
    'init_message' => $this->t('Preparing to download selected updates'),
    'operations' => $operations,
    'finished' => 'update_manager_download_batch_finished',
    'file' => drupal_get_path('module', 'update') . '/update.manager.inc',
  );
  batch_set($batch);
}