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.ThreadLocalUnmarshallerProvider implements io.netty.handler.codec.marshalling.UnmarshallerProvider
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider
  super_class: java.lang.Object
{
  private final io.netty.util.concurrent.FastThreadLocal<org.jboss.marshalling.Unmarshaller> unmarshallers;
    descriptor: Lio/netty/util/concurrent/FastThreadLocal;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Lio/netty/util/concurrent/FastThreadLocal<Lorg/jboss/marshalling/Unmarshaller;>;

  private final org.jboss.marshalling.MarshallerFactory factory;
    descriptor: Lorg/jboss/marshalling/MarshallerFactory;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final org.jboss.marshalling.MarshallingConfiguration config;
    descriptor: Lorg/jboss/marshalling/MarshallingConfiguration;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(org.jboss.marshalling.MarshallerFactory, org.jboss.marshalling.MarshallingConfiguration);
    descriptor: (Lorg/jboss/marshalling/MarshallerFactory;Lorg/jboss/marshalling/MarshallingConfiguration;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider this
        start local 1 // org.jboss.marshalling.MarshallerFactory factory
        start local 2 // org.jboss.marshalling.MarshallingConfiguration config
         0: .line 42
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 31
            aload 0 /* this */
            new io.netty.util.concurrent.FastThreadLocal
            dup
            invokespecial io.netty.util.concurrent.FastThreadLocal.<init>:()V
            putfield io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider.unmarshallers:Lio/netty/util/concurrent/FastThreadLocal;
         2: .line 43
            aload 0 /* this */
            aload 1 /* factory */
            putfield io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider.factory:Lorg/jboss/marshalling/MarshallerFactory;
         3: .line 44
            aload 0 /* this */
            aload 2 /* config */
            putfield io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider.config:Lorg/jboss/marshalling/MarshallingConfiguration;
         4: .line 45
            return
        end local 2 // org.jboss.marshalling.MarshallingConfiguration config
        end local 1 // org.jboss.marshalling.MarshallerFactory factory
        end local 0 // io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    5     0     this  Lio/netty/handler/codec/marshalling/ThreadLocalUnmarshallerProvider;
            0    5     1  factory  Lorg/jboss/marshalling/MarshallerFactory;
            0    5     2   config  Lorg/jboss/marshalling/MarshallingConfiguration;
    MethodParameters:
         Name  Flags
      factory  
      config   

  public org.jboss.marshalling.Unmarshaller getUnmarshaller(io.netty.channel.ChannelHandlerContext);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;)Lorg/jboss/marshalling/Unmarshaller;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
         0: .line 49
            aload 0 /* this */
            getfield io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider.unmarshallers:Lio/netty/util/concurrent/FastThreadLocal;
            invokevirtual io.netty.util.concurrent.FastThreadLocal.get:()Ljava/lang/Object;
            checkcast org.jboss.marshalling.Unmarshaller
            astore 2 /* unmarshaller */
        start local 2 // org.jboss.marshalling.Unmarshaller unmarshaller
         1: .line 50
            aload 2 /* unmarshaller */
            ifnonnull 4
         2: .line 51
            aload 0 /* this */
            getfield io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider.factory:Lorg/jboss/marshalling/MarshallerFactory;
            aload 0 /* this */
            getfield io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider.config:Lorg/jboss/marshalling/MarshallingConfiguration;
            invokeinterface org.jboss.marshalling.MarshallerFactory.createUnmarshaller:(Lorg/jboss/marshalling/MarshallingConfiguration;)Lorg/jboss/marshalling/Unmarshaller;
            astore 2 /* unmarshaller */
         3: .line 52
            aload 0 /* this */
            getfield io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider.unmarshallers:Lio/netty/util/concurrent/FastThreadLocal;
            aload 2 /* unmarshaller */
            invokevirtual io.netty.util.concurrent.FastThreadLocal.set:(Ljava/lang/Object;)V
         4: .line 54
      StackMap locals: org.jboss.marshalling.Unmarshaller
      StackMap stack:
            aload 2 /* unmarshaller */
            areturn
        end local 2 // org.jboss.marshalling.Unmarshaller unmarshaller
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.marshalling.ThreadLocalUnmarshallerProvider this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    5     0          this  Lio/netty/handler/codec/marshalling/ThreadLocalUnmarshallerProvider;
            0    5     1           ctx  Lio/netty/channel/ChannelHandlerContext;
            1    5     2  unmarshaller  Lorg/jboss/marshalling/Unmarshaller;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ctx   
}
SourceFile: "ThreadLocalUnmarshallerProvider.java"