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 abstract class io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder<M extends io.netty.handler.codec.memcache.MemcacheMessage> extends io.netty.handler.codec.MessageToMessageEncoder<java.lang.Object>
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder
  super_class: io.netty.handler.codec.MessageToMessageEncoder
{
  private boolean expectingMoreContent;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder this
         0: .line 36
            aload 0 /* this */
            invokespecial io.netty.handler.codec.MessageToMessageEncoder.<init>:()V
            return
        end local 0 // io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/memcache/AbstractMemcacheObjectEncoder<TM;>;

  protected void encode(io.netty.channel.ChannelHandlerContext, , java.util.List<java.lang.Object>);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;Ljava/util/List;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=5, args_size=4
        start local 0 // io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Object msg
        start local 3 // java.util.List out
         0: .line 42
            aload 2 /* msg */
            instanceof io.netty.handler.codec.memcache.MemcacheMessage
            ifeq 5
         1: .line 43
            aload 0 /* this */
            getfield io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder.expectingMoreContent:Z
            ifeq 3
         2: .line 44
            new java.lang.IllegalStateException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unexpected message type: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 2 /* msg */
            invokestatic io.netty.util.internal.StringUtil.simpleClassName:(Ljava/lang/Object;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
         3: .line 48
      StackMap locals:
      StackMap stack:
            aload 2 /* msg */
            checkcast io.netty.handler.codec.memcache.MemcacheMessage
            astore 4 /* m */
        start local 4 // io.netty.handler.codec.memcache.MemcacheMessage m
         4: .line 49
            aload 3 /* out */
            aload 0 /* this */
            aload 1 /* ctx */
            aload 4 /* m */
            invokevirtual io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder.encodeMessage:(Lio/netty/channel/ChannelHandlerContext;Lio/netty/handler/codec/memcache/MemcacheMessage;)Lio/netty/buffer/ByteBuf;
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
        end local 4 // io.netty.handler.codec.memcache.MemcacheMessage m
         5: .line 52
      StackMap locals:
      StackMap stack:
            aload 2 /* msg */
            instanceof io.netty.handler.codec.memcache.MemcacheContent
            ifne 6
            aload 2 /* msg */
            instanceof io.netty.buffer.ByteBuf
            ifne 6
            aload 2 /* msg */
            instanceof io.netty.channel.FileRegion
            ifeq 14
         6: .line 53
      StackMap locals:
      StackMap stack:
            aload 2 /* msg */
            invokestatic io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder.contentLength:(Ljava/lang/Object;)I
            istore 4 /* contentLength */
        start local 4 // int contentLength
         7: .line 54
            iload 4 /* contentLength */
            ifle 10
         8: .line 55
            aload 3 /* out */
            aload 2 /* msg */
            invokestatic io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder.encodeAndRetain:(Ljava/lang/Object;)Ljava/lang/Object;
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
         9: .line 56
            goto 11
        10: .line 57
      StackMap locals: int
      StackMap stack:
            aload 3 /* out */
            getstatic io.netty.buffer.Unpooled.EMPTY_BUFFER:Lio/netty/buffer/ByteBuf;
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
        11: .line 60
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 2 /* msg */
            instanceof io.netty.handler.codec.memcache.LastMemcacheContent
            ifeq 12
            iconst_0
            goto 13
      StackMap locals:
      StackMap stack: io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder
        12: iconst_1
      StackMap locals: io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder io.netty.channel.ChannelHandlerContext java.lang.Object java.util.List int
      StackMap stack: io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder int
        13: putfield io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder.expectingMoreContent:Z
        end local 4 // int contentLength
        14: .line 62
      StackMap locals:
      StackMap stack:
            return
        end local 3 // java.util.List out
        end local 2 // java.lang.Object msg
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   15     0           this  Lio/netty/handler/codec/memcache/AbstractMemcacheObjectEncoder<TM;>;
            0   15     1            ctx  Lio/netty/channel/ChannelHandlerContext;
            0   15     2            msg  Ljava/lang/Object;
            0   15     3            out  Ljava/util/List<Ljava/lang/Object;>;
            4    5     4              m  TM;
            7   14     4  contentLength  I
    Exceptions:
      throws java.lang.Exception
    Signature: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;Ljava/util/List<Ljava/lang/Object;>;)V
    MethodParameters:
      Name  Flags
      ctx   
      msg   
      out   

  public boolean acceptOutboundMessage(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder this
        start local 1 // java.lang.Object msg
         0: .line 66
            aload 1 /* msg */
            instanceof io.netty.handler.codec.memcache.MemcacheObject
            ifne 1
            aload 1 /* msg */
            instanceof io.netty.buffer.ByteBuf
            ifne 1
            aload 1 /* msg */
            instanceof io.netty.channel.FileRegion
            ifne 1
            iconst_0
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_1
            ireturn
        end local 1 // java.lang.Object msg
        end local 0 // io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/handler/codec/memcache/AbstractMemcacheObjectEncoder<TM;>;
            0    2     1   msg  Ljava/lang/Object;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      msg   

  protected abstract io.netty.buffer.ByteBuf encodeMessage(io.netty.channel.ChannelHandlerContext, M);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/handler/codec/memcache/MemcacheMessage;)Lio/netty/buffer/ByteBuf;
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    Signature: (Lio/netty/channel/ChannelHandlerContext;TM;)Lio/netty/buffer/ByteBuf;
    MethodParameters:
      Name  Flags
      ctx   
      msg   

  private static int contentLength(java.lang.Object);
    descriptor: (Ljava/lang/Object;)I
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object msg
         0: .line 85
            aload 0 /* msg */
            instanceof io.netty.handler.codec.memcache.MemcacheContent
            ifeq 2
         1: .line 86
            aload 0 /* msg */
            checkcast io.netty.handler.codec.memcache.MemcacheContent
            invokeinterface io.netty.handler.codec.memcache.MemcacheContent.content:()Lio/netty/buffer/ByteBuf;
            invokevirtual io.netty.buffer.ByteBuf.readableBytes:()I
            ireturn
         2: .line 88
      StackMap locals:
      StackMap stack:
            aload 0 /* msg */
            instanceof io.netty.buffer.ByteBuf
            ifeq 4
         3: .line 89
            aload 0 /* msg */
            checkcast io.netty.buffer.ByteBuf
            invokevirtual io.netty.buffer.ByteBuf.readableBytes:()I
            ireturn
         4: .line 91
      StackMap locals:
      StackMap stack:
            aload 0 /* msg */
            instanceof io.netty.channel.FileRegion
            ifeq 6
         5: .line 92
            aload 0 /* msg */
            checkcast io.netty.channel.FileRegion
            invokeinterface io.netty.channel.FileRegion.count:()J
            l2i
            ireturn
         6: .line 94
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalStateException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unexpected message type: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* msg */
            invokestatic io.netty.util.internal.StringUtil.simpleClassName:(Ljava/lang/Object;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // java.lang.Object msg
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0   msg  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      msg   

  private static java.lang.Object encodeAndRetain(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object msg
         0: .line 104
            aload 0 /* msg */
            instanceof io.netty.buffer.ByteBuf
            ifeq 2
         1: .line 105
            aload 0 /* msg */
            checkcast io.netty.buffer.ByteBuf
            invokevirtual io.netty.buffer.ByteBuf.retain:()Lio/netty/buffer/ByteBuf;
            areturn
         2: .line 107
      StackMap locals:
      StackMap stack:
            aload 0 /* msg */
            instanceof io.netty.handler.codec.memcache.MemcacheContent
            ifeq 4
         3: .line 108
            aload 0 /* msg */
            checkcast io.netty.handler.codec.memcache.MemcacheContent
            invokeinterface io.netty.handler.codec.memcache.MemcacheContent.content:()Lio/netty/buffer/ByteBuf;
            invokevirtual io.netty.buffer.ByteBuf.retain:()Lio/netty/buffer/ByteBuf;
            areturn
         4: .line 110
      StackMap locals:
      StackMap stack:
            aload 0 /* msg */
            instanceof io.netty.channel.FileRegion
            ifeq 6
         5: .line 111
            aload 0 /* msg */
            checkcast io.netty.channel.FileRegion
            invokeinterface io.netty.channel.FileRegion.retain:()Lio/netty/channel/FileRegion;
            areturn
         6: .line 113
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalStateException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unexpected message type: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* msg */
            invokestatic io.netty.util.internal.StringUtil.simpleClassName:(Ljava/lang/Object;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // java.lang.Object msg
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0   msg  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      msg   
}
Signature: <M::Lio/netty/handler/codec/memcache/MemcacheMessage;>Lio/netty/handler/codec/MessageToMessageEncoder<Ljava/lang/Object;>;
SourceFile: "AbstractMemcacheObjectEncoder.java"