/**
  * @static
  * @return class instance
  */
 public static function instance()
 {
     if (is_null(self::$_instance)) {
         self::$_instance = new self();
     }
     return self::$_instance;
 }
 public function check_response_for_errors($response)
 {
     return MainWP_Api_Manager_Plugin_Update::instance()->check_response_for_errors($response, $this->renew_license_url);
 }
 public function request_plugin_information($args)
 {
     $args['domain'] = $this->domain;
     return MainWP_Api_Manager_Plugin_Update::instance()->request($args);
 }