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) 
class io.netty.resolver.dns.DnsQueryContext$4 implements java.lang.Runnable
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: io.netty.resolver.dns.DnsQueryContext$4
  super_class: java.lang.Object
{
  final io.netty.resolver.dns.DnsQueryContext this$0;
    descriptor: Lio/netty/resolver/dns/DnsQueryContext;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final long val$queryTimeoutMillis;
    descriptor: J
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(io.netty.resolver.dns.DnsQueryContext, long);
    descriptor: (Lio/netty/resolver/dns/DnsQueryContext;J)V
    flags: (0x0000) 
    Code:
      stack=3, locals=4, args_size=3
        start local 0 // io.netty.resolver.dns.DnsQueryContext$4 this
         0: .line 154
            aload 0 /* this */
            aload 1
            putfield io.netty.resolver.dns.DnsQueryContext$4.this$0:Lio/netty/resolver/dns/DnsQueryContext;
            aload 0 /* this */
            lload 2
            putfield io.netty.resolver.dns.DnsQueryContext$4.val$queryTimeoutMillis:J
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // io.netty.resolver.dns.DnsQueryContext$4 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/resolver/dns/DnsQueryContext$4;
    MethodParameters:
                        Name  Flags
      this$0                  final
      val$queryTimeoutMillis  final

  public void run();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // io.netty.resolver.dns.DnsQueryContext$4 this
         0: .line 157
            aload 0 /* this */
            getfield io.netty.resolver.dns.DnsQueryContext$4.this$0:Lio/netty/resolver/dns/DnsQueryContext;
            getfield io.netty.resolver.dns.DnsQueryContext.promise:Lio/netty/util/concurrent/Promise;
            invokeinterface io.netty.util.concurrent.Promise.isDone:()Z
            ifeq 2
         1: .line 159
            return
         2: .line 162
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.netty.resolver.dns.DnsQueryContext$4.this$0:Lio/netty/resolver/dns/DnsQueryContext;
            new java.lang.StringBuilder
            dup
            ldc "query timed out after "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield io.netty.resolver.dns.DnsQueryContext$4.val$queryTimeoutMillis:J
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc " milliseconds"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            aconst_null
            invokevirtual io.netty.resolver.dns.DnsQueryContext.setFailure:(Ljava/lang/String;Ljava/lang/Throwable;)V
         3: .line 163
            return
        end local 0 // io.netty.resolver.dns.DnsQueryContext$4 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lio/netty/resolver/dns/DnsQueryContext$4;
}
SourceFile: "DnsQueryContext.java"
EnclosingMethod: io.netty.resolver.dns.DnsQueryContext.onQueryWriteCompletion:(Lio/netty/channel/ChannelFuture;)V
NestHost: io.netty.resolver.dns.DnsQueryContext
InnerClasses:
  io.netty.resolver.dns.DnsQueryContext$4