http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public class io.netty.handler.codec.marshalling.MarshallingDecoder extends io.netty.handler.codec.LengthFieldBasedFrameDecoder
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.handler.codec.marshalling.MarshallingDecoder
  super_class: io.netty.handler.codec.LengthFieldBasedFrameDecoder
{
  private final io.netty.handler.codec.marshalling.UnmarshallerProvider provider;
    descriptor: Lio/netty/handler/codec/marshalling/UnmarshallerProvider;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(io.netty.handler.codec.marshalling.UnmarshallerProvider);
    descriptor: (Lio/netty/handler/codec/marshalling/UnmarshallerProvider;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.marshalling.MarshallingDecoder this
        start local 1 // io.netty.handler.codec.marshalling.UnmarshallerProvider provider
         0: .line 45
            aload 0 /* this */
            aload 1 /* provider */
            ldc 1048576
            invokespecial io.netty.handler.codec.marshalling.MarshallingDecoder.<init>:(Lio/netty/handler/codec/marshalling/UnmarshallerProvider;I)V
         1: .line 46
            return
        end local 1 // io.netty.handler.codec.marshalling.UnmarshallerProvider provider
        end local 0 // io.netty.handler.codec.marshalling.MarshallingDecoder this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lio/netty/handler/codec/marshalling/MarshallingDecoder;
            0    2     1  provider  Lio/netty/handler/codec/marshalling/UnmarshallerProvider;
    MethodParameters:
          Name  Flags
      provider  

  public void <init>(io.netty.handler.codec.marshalling.UnmarshallerProvider, int);
    descriptor: (Lio/netty/handler/codec/marshalling/UnmarshallerProvider;I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.marshalling.MarshallingDecoder this
        start local 1 // io.netty.handler.codec.marshalling.UnmarshallerProvider provider
        start local 2 // int maxObjectSize
         0: .line 57
            aload 0 /* this */
            iload 2 /* maxObjectSize */
            iconst_0
            iconst_4
            iconst_0
            iconst_4
            invokespecial io.netty.handler.codec.LengthFieldBasedFrameDecoder.<init>:(IIIII)V
         1: .line 58
            aload 0 /* this */
            aload 1 /* provider */
            putfield io.netty.handler.codec.marshalling.MarshallingDecoder.provider:Lio/netty/handler/codec/marshalling/UnmarshallerProvider;
         2: .line 59
            return
        end local 2 // int maxObjectSize
        end local 1 // io.netty.handler.codec.marshalling.UnmarshallerProvider provider
        end local 0 // io.netty.handler.codec.marshalling.MarshallingDecoder this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    3     0           this  Lio/netty/handler/codec/marshalling/MarshallingDecoder;
            0    3     1       provider  Lio/netty/handler/codec/marshalling/UnmarshallerProvider;
            0    3     2  maxObjectSize  I
    MethodParameters:
               Name  Flags
      provider       
      maxObjectSize  

  protected java.lang.Object decode(io.netty.channel.ChannelHandlerContext, io.netty.buffer.ByteBuf);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;)Ljava/lang/Object;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=9, args_size=3
        start local 0 // io.netty.handler.codec.marshalling.MarshallingDecoder this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // io.netty.buffer.ByteBuf in
         0: .line 63
            aload 0 /* this */
            aload 1 /* ctx */
            aload 2 /* in */
            invokespecial io.netty.handler.codec.LengthFieldBasedFrameDecoder.decode:(Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;)Ljava/lang/Object;
            checkcast io.netty.buffer.ByteBuf
            astore 3 /* frame */
        start local 3 // io.netty.buffer.ByteBuf frame
         1: .line 64
            aload 3 /* frame */
            ifnonnull 3
         2: .line 65
            aconst_null
            areturn
         3: .line 68
      StackMap locals: io.netty.buffer.ByteBuf
      StackMap stack:
            aload 0 /* this */
            getfield io.netty.handler.codec.marshalling.MarshallingDecoder.provider:Lio/netty/handler/codec/marshalling/UnmarshallerProvider;
            aload 1 /* ctx */
            invokeinterface io.netty.handler.codec.marshalling.UnmarshallerProvider.getUnmarshaller:(Lio/netty/channel/ChannelHandlerContext;)Lorg/jboss/marshalling/Unmarshaller;
            astore 4 /* unmarshaller */
        start local 4 // org.jboss.marshalling.Unmarshaller unmarshaller
         4: .line 69
            new io.netty.handler.codec.marshalling.ChannelBufferByteInput
            dup
            aload 3 /* frame */
            invokespecial io.netty.handler.codec.marshalling.ChannelBufferByteInput.<init>:(Lio/netty/buffer/ByteBuf;)V
            astore 5 /* input */
        start local 5 // org.jboss.marshalling.ByteInput input
         5: .line 72
            aload 4 /* unmarshaller */
            aload 5 /* input */
            invokeinterface org.jboss.marshalling.Unmarshaller.start:(Lorg/jboss/marshalling/ByteInput;)V
         6: .line 73
            aload 4 /* unmarshaller */
            invokeinterface org.jboss.marshalling.Unmarshaller.readObject:()Ljava/lang/Object;
            astore 6 /* obj */
        start local 6 // java.lang.Object obj
         7: .line 74
            aload 4 /* unmarshaller */
            invokeinterface org.jboss.marshalling.Unmarshaller.finish:()V
         8: .line 75
            aload 6 /* obj */
            astore 8
         9: .line 79
            aload 4 /* unmarshaller */
            invokeinterface org.jboss.marshalling.Unmarshaller.close:()V
        10: .line 75
            aload 8
            areturn
        end local 6 // java.lang.Object obj
        11: .line 76
      StackMap locals: io.netty.handler.codec.marshalling.MarshallingDecoder io.netty.channel.ChannelHandlerContext io.netty.buffer.ByteBuf io.netty.buffer.ByteBuf org.jboss.marshalling.Unmarshaller org.jboss.marshalling.ByteInput
      StackMap stack: java.lang.Throwable
            astore 7
        12: .line 79
            aload 4 /* unmarshaller */
            invokeinterface org.jboss.marshalling.Unmarshaller.close:()V
        13: .line 80
            aload 7
            athrow
        end local 5 // org.jboss.marshalling.ByteInput input
        end local 4 // org.jboss.marshalling.Unmarshaller unmarshaller
        end local 3 // io.netty.buffer.ByteBuf frame
        end local 2 // io.netty.buffer.ByteBuf in
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.marshalling.MarshallingDecoder this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0   14     0          this  Lio/netty/handler/codec/marshalling/MarshallingDecoder;
            0   14     1           ctx  Lio/netty/channel/ChannelHandlerContext;
            0   14     2            in  Lio/netty/buffer/ByteBuf;
            1   14     3         frame  Lio/netty/buffer/ByteBuf;
            4   14     4  unmarshaller  Lorg/jboss/marshalling/Unmarshaller;
            5   14     5         input  Lorg/jboss/marshalling/ByteInput;
            7   11     6           obj  Ljava/lang/Object;
      Exception table:
        from    to  target  type
           5     9      11  any
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ctx   
      in    

  protected io.netty.buffer.ByteBuf extractFrame(io.netty.channel.ChannelHandlerContext, io.netty.buffer.ByteBuf, int, int);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;II)Lio/netty/buffer/ByteBuf;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=5, args_size=5
        start local 0 // io.netty.handler.codec.marshalling.MarshallingDecoder this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // io.netty.buffer.ByteBuf buffer
        start local 3 // int index
        start local 4 // int length
         0: .line 85
            aload 2 /* buffer */
            iload 3 /* index */
            iload 4 /* length */
            invokevirtual io.netty.buffer.ByteBuf.slice:(II)Lio/netty/buffer/ByteBuf;
            areturn
        end local 4 // int length
        end local 3 // int index
        end local 2 // io.netty.buffer.ByteBuf buffer
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.marshalling.MarshallingDecoder this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0    this  Lio/netty/handler/codec/marshalling/MarshallingDecoder;
            0    1     1     ctx  Lio/netty/channel/ChannelHandlerContext;
            0    1     2  buffer  Lio/netty/buffer/ByteBuf;
            0    1     3   index  I
            0    1     4  length  I
    MethodParameters:
        Name  Flags
      ctx     
      buffer  
      index   
      length  
}
SourceFile: "MarshallingDecoder.java"