function clear_all_sticky( $network_level_or_blog_id = null ) {
            if ( ! $this->_is_multisite ||
                 false === $network_level_or_blog_id ||
                 0 == $network_level_or_blog_id ||
                 is_null( $network_level_or_blog_id )
            ) {
                $notices = $this->get_site_notices( $network_level_or_blog_id );
                $notices->clear_all_sticky();
            }

            if ( $this->_is_multisite &&
                 ( true === $network_level_or_blog_id || is_null( $network_level_or_blog_id ) )
            ) {
                $this->_network_notices->clear_all_sticky();
            }
        }