class FormAjaxException

class FormAjaxException extends \Exception {
    
    /**
     * The form definition.
     *
     * @var array
     */
    protected $form;
    
    /**
     * The form state.
     *
     * @var \Drupal\Core\Form\FormStateInterface
     */
    protected $formState;
    
    /**
     * Constructs a FormAjaxException object.
     *
     * @param array $form
     *   The form definition.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   The form state.
     * @param string $message
     *   (optional) The exception message.
     * @param int $code
     *   (optional) A user defined exception code.
     * @param \Exception $previous
     *   (optional) The previous exception for nested exceptions.
     */
    public function __construct(array $form, FormStateInterface $form_state, $message = "", $code = 0, \Exception $previous = NULL) {
        parent::__construct($message, $code, $previous);
        $this->form = $form;
        $this->formState = $form_state;
    }
    
    /**
     * Gets the form definition.
     *
     * @return array
     *   The form structure.
     */
    public function getForm() {
        return $this->form;
    }
    
    /**
     * Gets the form state.
     *
     * @return \Drupal\Core\Form\FormStateInterface
     *   The current state of the form.
     */
    public function getFormState() {
        return $this->formState;
    }

}