Handle any special handling on the validate form.
Overrides PluginBase::submitOptionsForm
public function submitOptionsForm(&$form, &$form_state) {
$form_state['values']['exposed_form_options']['text_input_required_format'] = $form_state['values']['exposed_form_options']['text_input_required']['format'];
$form_state['values']['exposed_form_options']['text_input_required'] = $form_state['values']['exposed_form_options']['text_input_required']['value'];
parent::submitOptionsForm($form, $form_state);
}