class UpdateBlockForm

class UpdateBlockForm extends ConfigureBlockFormBase {
  use LayoutBuilderHighlightTrait;

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'layout_builder_update_block';
  }

  /**
   * Builds the block form.
   *
   * @param array $form
   *   An associative array containing the structure of the form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   * @param \Drupal\layout_builder\SectionStorageInterface $section_storage
   *   The section storage being configured.
   * @param int $delta
   *   The delta of the section.
   * @param string $region
   *   The region of the block.
   * @param string $uuid
   *   The UUID of the block being updated.
   *
   * @return array
   *   The form array.
   */
  public function buildForm(array $form, FormStateInterface $form_state, SectionStorageInterface $section_storage = NULL, $delta = NULL, $region = NULL, $uuid = NULL) {
    $component = $section_storage
      ->getSection($delta)
      ->getComponent($uuid);
    $form['#attributes']['data-layout-builder-target-highlight-id'] = $this
      ->blockUpdateHighlightId($uuid);
    return $this
      ->doBuildForm($form, $form_state, $section_storage, $delta, $component);
  }

  /**
   * {@inheritdoc}
   */
  protected function submitLabel() {
    return $this
      ->t('Update');
  }

}