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.timeout.TimeoutException extends io.netty.channel.ChannelException
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.handler.timeout.TimeoutException
  super_class: io.netty.channel.ChannelException
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 4673641882869672533

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.timeout.TimeoutException this
         0: .line 28
            aload 0 /* this */
            invokespecial io.netty.channel.ChannelException.<init>:()V
            return
        end local 0 // io.netty.handler.timeout.TimeoutException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/timeout/TimeoutException;

  public java.lang.Throwable fillInStackTrace();
    descriptor: ()Ljava/lang/Throwable;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.timeout.TimeoutException this
         0: .line 32
            aload 0 /* this */
            areturn
        end local 0 // io.netty.handler.timeout.TimeoutException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/timeout/TimeoutException;
}
SourceFile: "TimeoutException.java"