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 final class io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory implements io.netty.resolver.dns.DnsQueryLifecycleObserverFactory
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory
  super_class: java.lang.Object
{
  public static final io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory INSTANCE;
    descriptor: Lio/netty/resolver/dns/NoopDnsQueryLifecycleObserverFactory;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 23
            new io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory
            dup
            invokespecial io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory.<init>:()V
            putstatic io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory.INSTANCE:Lio/netty/resolver/dns/NoopDnsQueryLifecycleObserverFactory;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory this
         0: .line 25
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 26
            return
        end local 0 // io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/resolver/dns/NoopDnsQueryLifecycleObserverFactory;

  public io.netty.resolver.dns.DnsQueryLifecycleObserver newDnsQueryLifecycleObserver(io.netty.handler.codec.dns.DnsQuestion);
    descriptor: (Lio/netty/handler/codec/dns/DnsQuestion;)Lio/netty/resolver/dns/DnsQueryLifecycleObserver;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory this
        start local 1 // io.netty.handler.codec.dns.DnsQuestion question
         0: .line 30
            getstatic io.netty.resolver.dns.NoopDnsQueryLifecycleObserver.INSTANCE:Lio/netty/resolver/dns/NoopDnsQueryLifecycleObserver;
            areturn
        end local 1 // io.netty.handler.codec.dns.DnsQuestion question
        end local 0 // io.netty.resolver.dns.NoopDnsQueryLifecycleObserverFactory this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Lio/netty/resolver/dns/NoopDnsQueryLifecycleObserverFactory;
            0    1     1  question  Lio/netty/handler/codec/dns/DnsQuestion;
    MethodParameters:
          Name  Flags
      question  
}
SourceFile: "NoopDnsQueryLifecycleObserverFactory.java"