private function should_use_network_storage( $option, $network_level_or_blog_id = null ) {
            if ( ! $this->_is_multisite ) {
                // Not a multisite environment.
                return false;
            }

            if ( is_numeric( $network_level_or_blog_id ) ) {
                // Explicitly asked to use a specified blog storage.
                return false;
            }

            if ( is_bool( $network_level_or_blog_id ) ) {
                // Explicitly specified whether should use the network or blog level storage.
                return $network_level_or_blog_id;
            }

            // Determine which storage to use based on the option.
            return ! $this->is_site_option( $option );
        }