public class PacketHandler implements IPacketHandler {

    @Override
    public void onPacketData(INetworkManager manager, Packet250CustomPayload packet, Player player) {
        ByteArrayDataInput reader = ByteStreams.newDataInput(packet.data);
        EntityPlayer entityPlayer = (EntityPlayer)player;
        byte packetID = reader.readByte();
        switch (packetID) {
        case 0:
            byte buttonID = reader.readByte();
            Container container = entityPlayer.openContainer;
            if(container != null && container instanceof ContainerSciBench) {
                //Changed line
                ((ContainerSciBench) container).receiveButtonEvent(buttonID);
            }
            break;
        }
    }

    public static void sendButtonPacket(byte id) {
        ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
        DataOutputStream dataStream = new DataOutputStream(byteStream);

        try {
            dataStream.writeByte((byte)0);
            dataStream.writeByte(id);
            PacketDispatcher.sendPacketToServer(PacketDispatcher.getPacket(Info.CHANNEL, byteStream.toByteArray()));
        } catch(IOException io) {
            System.out.println("Failed to send packet");
        }

    }
}