set_found_networks example

        unset( $_args['fields'], $_args['update_network_cache'] );

        $key          = md5( serialize( $_args ) );
        $last_changed = wp_cache_get_last_changed( 'networks' );

        $cache_key   = "get_network_ids:$key:$last_changed";
        $cache_value = wp_cache_get( $cache_key, 'network-queries' );

        if ( false === $cache_value ) {
            $network_ids = $this->get_network_ids();
            if ( $network_ids ) {
                $this->set_found_networks();
            }

            $cache_value = array(
                'network_ids'    => $network_ids,
                'found_networks' => $this->found_networks,
            );
            wp_cache_add( $cache_key, $cache_value, 'network-queries' );
        } else {
            $network_ids          = $cache_value['network_ids'];
            $this->found_networks = $cache_value['found_networks'];
        }