如何在表格中插入表单元素(Drupal8)？

use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;

/**
 * Implements the example form.
 */
class ExampleForm extends FormBase {

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

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form['table'] = [
      '#type' => 'table',
      '#header' => ['Name', 'Email', 'Action'],
      '#rows' => [
        ['John Doe', 'john@example.com', $this->createButton('Edit')],
        ['Jane Smith', 'jane@example.com', $this->createButton('Delete')],
      ],
    ];

    return $form;
  }

  /**
   * Helper function to create a button element.
   */
  private function createButton($label) {
    return [
      '#type' => 'submit',
      '#value' => $label,
      '#attributes' => [
        'class' => ['button'],
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    // Handle form submission.
  }

}