public static void SendPacket(this IChannelGroup channelGroup, PacketDefinition packet, IChannelMatcher matcher)
 => channelGroup.SendPackets(new[] { packet }, matcher);
 public static void SendPackets(this IChannelGroup channelGroup, IEnumerable <PacketDefinition> packets) =>
 channelGroup.SendPackets(packets, null);
 public static void SendPacket(this IChannelGroup channelGroup, PacketDefinition packet)
 => channelGroup.SendPackets(new[] { packet });