public void sendPluginMessage(PluginMessageRecipient player, ChannelMessage message) {
    if (player != null) {
        ByteArrayDataOutput dataOutput = ByteStreams.newDataOutput();
        message.writeTo(dataOutput);

        NamespaceKey channel = new NamespaceKey(plugin.getName(), message.getChannelName());
        player.sendPluginMessage(plugin, channel.getCombinedName(), dataOutput.toByteArray());
    }
}
 

public void sendPluginMessage(PluginMessageRecipient sender, ChannelMessage message) {
    ByteArrayDataOutput out = ByteStreams.newDataOutput();
    message.writeTo(out);

    NamespaceKey channel = new NamespaceKey(getName(), message.getChannelName());
    sender.sendPluginMessage(this, channel.getCombinedName(), out.toByteArray());
}