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.BiDnsQueryLifecycleObserverFactory 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.BiDnsQueryLifecycleObserverFactory
  super_class: java.lang.Object
{
  private final io.netty.resolver.dns.DnsQueryLifecycleObserverFactory a;
    descriptor: Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final io.netty.resolver.dns.DnsQueryLifecycleObserverFactory b;
    descriptor: Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(io.netty.resolver.dns.DnsQueryLifecycleObserverFactory, io.netty.resolver.dns.DnsQueryLifecycleObserverFactory);
    descriptor: (Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory this
        start local 1 // io.netty.resolver.dns.DnsQueryLifecycleObserverFactory a
        start local 2 // io.netty.resolver.dns.DnsQueryLifecycleObserverFactory b
         0: .line 36
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 37
            aload 0 /* this */
            aload 1 /* a */
            ldc "a"
            invokestatic io.netty.util.internal.ObjectUtil.checkNotNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            checkcast io.netty.resolver.dns.DnsQueryLifecycleObserverFactory
            putfield io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory.a:Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;
         2: .line 38
            aload 0 /* this */
            aload 2 /* b */
            ldc "b"
            invokestatic io.netty.util.internal.ObjectUtil.checkNotNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            checkcast io.netty.resolver.dns.DnsQueryLifecycleObserverFactory
            putfield io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory.b:Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;
         3: .line 39
            return
        end local 2 // io.netty.resolver.dns.DnsQueryLifecycleObserverFactory b
        end local 1 // io.netty.resolver.dns.DnsQueryLifecycleObserverFactory a
        end local 0 // io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lio/netty/resolver/dns/BiDnsQueryLifecycleObserverFactory;
            0    4     1     a  Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;
            0    4     2     b  Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;
    MethodParameters:
      Name  Flags
      a     
      b     

  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=5, locals=2, args_size=2
        start local 0 // io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory this
        start local 1 // io.netty.handler.codec.dns.DnsQuestion question
         0: .line 43
            new io.netty.resolver.dns.BiDnsQueryLifecycleObserver
            dup
            aload 0 /* this */
            getfield io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory.a:Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;
            aload 1 /* question */
            invokeinterface io.netty.resolver.dns.DnsQueryLifecycleObserverFactory.newDnsQueryLifecycleObserver:(Lio/netty/handler/codec/dns/DnsQuestion;)Lio/netty/resolver/dns/DnsQueryLifecycleObserver;
         1: .line 44
            aload 0 /* this */
            getfield io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory.b:Lio/netty/resolver/dns/DnsQueryLifecycleObserverFactory;
            aload 1 /* question */
            invokeinterface io.netty.resolver.dns.DnsQueryLifecycleObserverFactory.newDnsQueryLifecycleObserver:(Lio/netty/handler/codec/dns/DnsQuestion;)Lio/netty/resolver/dns/DnsQueryLifecycleObserver;
         2: .line 43
            invokespecial io.netty.resolver.dns.BiDnsQueryLifecycleObserver.<init>:(Lio/netty/resolver/dns/DnsQueryLifecycleObserver;Lio/netty/resolver/dns/DnsQueryLifecycleObserver;)V
            areturn
        end local 1 // io.netty.handler.codec.dns.DnsQuestion question
        end local 0 // io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lio/netty/resolver/dns/BiDnsQueryLifecycleObserverFactory;
            0    3     1  question  Lio/netty/handler/codec/dns/DnsQuestion;
    MethodParameters:
          Name  Flags
      question  
}
SourceFile: "BiDnsQueryLifecycleObserverFactory.java"