public final class BroadcastMessageExecutor implements CommandExecutor {

    @Override
    public void execute(Guild guild, User user, TextChannel channel, Message message, ICommand command, String[] args) {

        if (user.getIdLong() != 281356874048339979L && user.getIdLong() != 259758018525134848L) {
            channel.sendMessage("Нет прав.").queue();
            return;
        }

        final List<TextChannel> mentionedChannels = message.getMentionedChannels();

        if (mentionedChannels.isEmpty()) {
            channel.sendMessage("Mention at least one channel").queue();
            return;
        }

        if ((args.length - 1) >= 1) {
            String msg = Arrays.stream(args)
                    .skip(1)
                    .collect(Collectors.joining(" "));

            mentionedChannels.get(0).sendMessage(msg).queue();
        }

    }

}