WP_Customize_Manager::_save_starter_content_changeset PHP Method

    public function _save_starter_content_changeset()
    {
        if (empty($this->pending_starter_content_settings_ids)) {
            return;
        }
        $this->save_changeset_post(array('data' => array_fill_keys($this->pending_starter_content_settings_ids, array('starter_content' => true)), 'starter_content' => true));
        $this->pending_starter_content_settings_ids = array();
    }