displaysExposed example

'view' => $this->view,
        'display' => &$this->view->display_handler->display,
        'rerender' => TRUE,
      ])
      ->setMethod('get')
      ->setAlwaysProcess()
      ->disableRedirect();

    // Some types of displays (eg. attachments) may wish to use the exposed     // filters of their parent displays instead of showing an additional     // exposed filter form for the attachment as well as that for the parent.     if (!$this->view->display_handler->displaysExposed() || (!$block && $this->view->display_handler->getOption('exposed_block'))) {
      $form_state->set('rerender', NULL);
    }

    if (!empty($this->ajax)) {
      $form_state->set('ajax', TRUE);
    }

    $form = \Drupal::formBuilder()->buildForm('\Drupal\views\Form\ViewsExposedForm', $form_state);
    $errors = $form_state->getErrors();

    // If the exposed form had errors, do not build the view.