public ViewsFormInterface::getFormState(ViewEntityInterface $view, $display_id, $js)
Gets the form state for this form.
Parameters
\Drupal\views\ViewEntityInterface $view: The view being edited.
string|null $display_id: The display ID being edited, or NULL to load the first available display.
string $js: If this is an AJAX form, it will be the string 'ajax'. Otherwise, it will be 'nojs'. This determines the response.
Return value
\Drupal\Core\Form\FormStateInterface The current state of the f