Stores a validated view from a form submission.
array $form: The full wizard form array.
array $form_state: The current state of the wizard form.
Drupal\views_ui\ViewUI $view: The validated view object.
protected function set_validated_view(array $form, array &$form_state, ViewUI $view) {
$key = hash('sha256', serialize($form_state['values']));
$this->validated_views[$key] = $view;
}