@brief Method is used to add @see AsyncRouteListener "AsyncRouteListener" class element
which will notify async route events.
@note Do not forget to remove listener if it is no longer needed!
@param listener Сorresponding @see AsyncRouteListener "AsyncRouteListener" class.
@brief Method is used for removing previously added @see AsyncRouteListener "AsyncRouteListener" class element.
@param listener Сorresponding @see AsyncRouteListener "AsyncRouteListener" class to remove.