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) 
final class io.netty.resolver.dns.DefaultDnsCache$Entries extends java.util.concurrent.atomic.AtomicReference<java.util.List<io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry>>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: io.netty.resolver.dns.DefaultDnsCache$Entries
  super_class: java.util.concurrent.atomic.AtomicReference
{
  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 269
            ldc Lio/netty/resolver/dns/DefaultDnsCache;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic io.netty.resolver.dns.DefaultDnsCache$Entries.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry);
    descriptor: (Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.resolver.dns.DefaultDnsCache$Entries this
        start local 1 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry entry
         0: .line 272
            aload 0 /* this */
            aload 1 /* entry */
            invokestatic java.util.Collections.singletonList:(Ljava/lang/Object;)Ljava/util/List;
            invokespecial java.util.concurrent.atomic.AtomicReference.<init>:(Ljava/lang/Object;)V
         1: .line 273
            return
        end local 1 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry entry
        end local 0 // io.netty.resolver.dns.DefaultDnsCache$Entries this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lio/netty/resolver/dns/DefaultDnsCache$Entries;
            0    2     1  entry  Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;
    MethodParameters:
       Name  Flags
      entry  

  void add(io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry);
    descriptor: (Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;)V
    flags: (0x0000) 
    Code:
      stack=4, locals=8, args_size=2
        start local 0 // io.netty.resolver.dns.DefaultDnsCache$Entries this
        start local 1 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry e
         0: .line 276
            aload 1 /* e */
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry.cause:()Ljava/lang/Throwable;
            ifnonnull 28
         1: .line 278
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$Entries.get:()Ljava/lang/Object;
            checkcast java.util.List
            astore 2 /* entries */
        start local 2 // java.util.List entries
         2: .line 279
            aload 2 /* entries */
            invokeinterface java.util.List.isEmpty:()Z
            ifne 26
         3: .line 280
            aload 2 /* entries */
            iconst_0
            invokeinterface java.util.List.get:(I)Ljava/lang/Object;
            checkcast io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry
            astore 3 /* firstEntry */
        start local 3 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry firstEntry
         4: .line 281
            aload 3 /* firstEntry */
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry.cause:()Ljava/lang/Throwable;
            ifnull 9
         5: .line 282
            getstatic io.netty.resolver.dns.DefaultDnsCache$Entries.$assertionsDisabled:Z
            ifne 6
            aload 2 /* entries */
            invokeinterface java.util.List.size:()I
            iconst_1
            if_icmpeq 6
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         6: .line 283
      StackMap locals: java.util.List io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry
      StackMap stack:
            aload 0 /* this */
            aload 2 /* entries */
            aload 1 /* e */
            invokestatic java.util.Collections.singletonList:(Ljava/lang/Object;)Ljava/util/List;
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$Entries.compareAndSet:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifeq 1
         7: .line 284
            aload 3 /* firstEntry */
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry.cancelExpiration:()V
         8: .line 285
            return
         9: .line 293
      StackMap locals:
      StackMap stack:
            new java.util.ArrayList
            dup
            aload 2 /* entries */
            invokeinterface java.util.List.size:()I
            iconst_1
            iadd
            invokespecial java.util.ArrayList.<init>:(I)V
            astore 4 /* newEntries */
        start local 4 // java.util.List newEntries
        10: .line 294
            aconst_null
            astore 5 /* replacedEntry */
        start local 5 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry replacedEntry
        11: .line 295
            iconst_0
            istore 6 /* i */
        start local 6 // int i
        12: goto 20
        13: .line 296
      StackMap locals: java.util.List io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry int
      StackMap stack:
            aload 2 /* entries */
            iload 6 /* i */
            invokeinterface java.util.List.get:(I)Ljava/lang/Object;
            checkcast io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry
            astore 7 /* entry */
        start local 7 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry entry
        14: .line 300
            aload 1 /* e */
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry.address:()Ljava/net/InetAddress;
            aload 7 /* entry */
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry.address:()Ljava/net/InetAddress;
            invokevirtual java.net.InetAddress.equals:(Ljava/lang/Object;)Z
            ifne 17
        15: .line 301
            aload 4 /* newEntries */
            aload 7 /* entry */
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
        16: .line 302
            goto 19
        17: .line 303
      StackMap locals: io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry
      StackMap stack:
            getstatic io.netty.resolver.dns.DefaultDnsCache$Entries.$assertionsDisabled:Z
            ifne 18
            aload 5 /* replacedEntry */
            ifnull 18
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
        18: .line 304
      StackMap locals:
      StackMap stack:
            aload 7 /* entry */
            astore 5 /* replacedEntry */
        end local 7 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry entry
        19: .line 295
      StackMap locals:
      StackMap stack:
            iinc 6 /* i */ 1
      StackMap locals:
      StackMap stack:
        20: iload 6 /* i */
            aload 2 /* entries */
            invokeinterface java.util.List.size:()I
            if_icmplt 13
        end local 6 // int i
        21: .line 307
            aload 4 /* newEntries */
            aload 1 /* e */
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
        22: .line 308
            aload 0 /* this */
            aload 2 /* entries */
            aload 4 /* newEntries */
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$Entries.compareAndSet:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifeq 1
        23: .line 309
            aload 5 /* replacedEntry */
            ifnull 25
        24: .line 310
            aload 5 /* replacedEntry */
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry.cancelExpiration:()V
        25: .line 312
      StackMap locals:
      StackMap stack:
            return
        end local 5 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry replacedEntry
        end local 4 // java.util.List newEntries
        end local 3 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry firstEntry
        26: .line 314
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 2 /* entries */
            aload 1 /* e */
            invokestatic java.util.Collections.singletonList:(Ljava/lang/Object;)Ljava/util/List;
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$Entries.compareAndSet:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifeq 1
        27: .line 315
            return
        end local 2 // java.util.List entries
        28: .line 319
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* e */
            invokestatic java.util.Collections.singletonList:(Ljava/lang/Object;)Ljava/util/List;
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$Entries.getAndSet:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.util.List
            astore 2 /* entries */
        start local 2 // java.util.List entries
        29: .line 320
            aload 2 /* entries */
            invokestatic io.netty.resolver.dns.DefaultDnsCache$Entries.cancelExpiration:(Ljava/util/List;)V
        end local 2 // java.util.List entries
        30: .line 322
            return
        end local 1 // io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry e
        end local 0 // io.netty.resolver.dns.DefaultDnsCache$Entries this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   31     0           this  Lio/netty/resolver/dns/DefaultDnsCache$Entries;
            0   31     1              e  Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;
            2   28     2        entries  Ljava/util/List<Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;>;
            4   26     3     firstEntry  Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;
           10   26     4     newEntries  Ljava/util/List<Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;>;
           11   26     5  replacedEntry  Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;
           12   21     6              i  I
           14   19     7          entry  Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;
           29   30     2        entries  Ljava/util/List<Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;>;
    MethodParameters:
      Name  Flags
      e     

  boolean clearAndCancel();
    descriptor: ()Z
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // io.netty.resolver.dns.DefaultDnsCache$Entries this
         0: .line 325
            aload 0 /* this */
            invokestatic java.util.Collections.emptyList:()Ljava/util/List;
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$Entries.getAndSet:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.util.List
            astore 1 /* entries */
        start local 1 // java.util.List entries
         1: .line 326
            aload 1 /* entries */
            invokeinterface java.util.List.isEmpty:()Z
            ifeq 3
         2: .line 327
            iconst_0
            ireturn
         3: .line 330
      StackMap locals: java.util.List
      StackMap stack:
            aload 1 /* entries */
            invokestatic io.netty.resolver.dns.DefaultDnsCache$Entries.cancelExpiration:(Ljava/util/List;)V
         4: .line 331
            iconst_1
            ireturn
        end local 1 // java.util.List entries
        end local 0 // io.netty.resolver.dns.DefaultDnsCache$Entries this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    5     0     this  Lio/netty/resolver/dns/DefaultDnsCache$Entries;
            1    5     1  entries  Ljava/util/List<Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;>;

  private static void cancelExpiration(java.util.List<io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry>);
    descriptor: (Ljava/util/List;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=2, locals=3, args_size=1
        start local 0 // java.util.List entryList
         0: .line 335
            aload 0 /* entryList */
            invokeinterface java.util.List.size:()I
            istore 1 /* numEntries */
        start local 1 // int numEntries
         1: .line 336
            iconst_0
            istore 2 /* i */
        start local 2 // int i
         2: goto 5
         3: .line 337
      StackMap locals: int int
      StackMap stack:
            aload 0 /* entryList */
            iload 2 /* i */
            invokeinterface java.util.List.get:(I)Ljava/lang/Object;
            checkcast io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry
            invokevirtual io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry.cancelExpiration:()V
         4: .line 336
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
         5: iload 2 /* i */
            iload 1 /* numEntries */
            if_icmplt 3
        end local 2 // int i
         6: .line 339
            return
        end local 1 // int numEntries
        end local 0 // java.util.List entryList
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    7     0   entryList  Ljava/util/List<Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;>;
            1    7     1  numEntries  I
            2    6     2           i  I
    Signature: (Ljava/util/List<Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;>;)V
    MethodParameters:
           Name  Flags
      entryList  
}
Signature: Ljava/util/concurrent/atomic/AtomicReference<Ljava/util/List<Lio/netty/resolver/dns/DefaultDnsCache$DefaultDnsCacheEntry;>;>;
SourceFile: "DefaultDnsCache.java"
NestHost: io.netty.resolver.dns.DefaultDnsCache
InnerClasses:
  private final DefaultDnsCacheEntry = io.netty.resolver.dns.DefaultDnsCache$DefaultDnsCacheEntry of io.netty.resolver.dns.DefaultDnsCache
  private final Entries = io.netty.resolver.dns.DefaultDnsCache$Entries of io.netty.resolver.dns.DefaultDnsCache