kiwi.plugin('myplugin', function(kiwi) {
    kiwi.on('irc.message', function(message, network, event) {
        if (message.nick === '*bnc' && message.message) {
            // Only show *bnc messages if we have the buffer open.
            // We don't want confusing messages to users
            let buffer = network.bufferByName('*bnc');
            if (!buffer) {
                event.handled = true;
            }
        }
    });
});