public void a(class_aco var1) {
    if (var1 == null) {
      writeShort(-1);
    } else {
      writeShort(Item.b(var1.b()));
      writeByte(var1.b);
      writeShort(var1.i());
      class_dn var2 = null;
      if (var1.b().m() || var1.b().p()) {
        var2 = var1.o();
      }

      this.a(var2);
    }
  }
  @Override
  public void b(PacketDataSerializer packetdataserializer)
      throws IOException { // CraftBukkit - added throws
    packetdataserializer.b(a);

    UUID uuid = b.getId();
    // Spigot start - protocol patch
    if (packetdataserializer.version < 20) {
      packetdataserializer.a(
          uuid == null
              ? ""
              : packetdataserializer.version >= 5
                  ? uuid.toString()
                  : uuid.toString().replaceAll("-", "")); // Spigot
      packetdataserializer.a(
          b.getName().length() > 16
              ? b.getName().substring(0, 16)
              : b.getName()); // CraftBukkit - Limit name length to 16 characters
      if (packetdataserializer.version >= 5) { // Spigot
        packetdataserializer.b(b.getProperties().size());
        Iterator iterator = b.getProperties().values().iterator();

        while (iterator.hasNext()) {
          Property property = (Property) iterator.next();

          packetdataserializer.a(property.getName());
          packetdataserializer.a(property.getValue());
          packetdataserializer.a(property.getSignature());
        }
      }
    } else {
      packetdataserializer.writeUUID(uuid);
    }
    // Spigot end

    packetdataserializer.writeInt(c);
    packetdataserializer.writeInt(d);
    packetdataserializer.writeInt(e);
    packetdataserializer.writeByte(f);
    packetdataserializer.writeByte(g);
    // Spigot start - protocol patch
    if (packetdataserializer.version >= 47) {
      packetdataserializer.writeShort(org.spigotmc.SpigotDebreakifier.getItemId(h));
    } else {
      packetdataserializer.writeShort(h);
    }
    i.a(packetdataserializer);
  }
 public void b(PacketDataSerializer packetdataserializer) throws IOException {
   packetdataserializer.writeByte(this.a);
   packetdataserializer.writeShort(this.b);
   packetdataserializer.writeBoolean(this.c);
 }