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 abstract class io.netty.resolver.SimpleNameResolver<T> implements io.netty.resolver.NameResolver<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: io.netty.resolver.SimpleNameResolver
  super_class: java.lang.Object
{
  private final io.netty.util.concurrent.EventExecutor executor;
    descriptor: Lio/netty/util/concurrent/EventExecutor;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  protected void <init>(io.netty.util.concurrent.EventExecutor);
    descriptor: (Lio/netty/util/concurrent/EventExecutor;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // io.netty.resolver.SimpleNameResolver this
        start local 1 // io.netty.util.concurrent.EventExecutor executor
         0: .line 40
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 41
            aload 0 /* this */
            aload 1 /* executor */
            ldc "executor"
            invokestatic io.netty.util.internal.ObjectUtil.checkNotNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            checkcast io.netty.util.concurrent.EventExecutor
            putfield io.netty.resolver.SimpleNameResolver.executor:Lio/netty/util/concurrent/EventExecutor;
         2: .line 42
            return
        end local 1 // io.netty.util.concurrent.EventExecutor executor
        end local 0 // io.netty.resolver.SimpleNameResolver this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lio/netty/resolver/SimpleNameResolver<TT;>;
            0    3     1  executor  Lio/netty/util/concurrent/EventExecutor;
    MethodParameters:
          Name  Flags
      executor  

  protected io.netty.util.concurrent.EventExecutor executor();
    descriptor: ()Lio/netty/util/concurrent/EventExecutor;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.resolver.SimpleNameResolver this
         0: .line 49
            aload 0 /* this */
            getfield io.netty.resolver.SimpleNameResolver.executor:Lio/netty/util/concurrent/EventExecutor;
            areturn
        end local 0 // io.netty.resolver.SimpleNameResolver this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/resolver/SimpleNameResolver<TT;>;

  public final io.netty.util.concurrent.Future<T> resolve(java.lang.String);
    descriptor: (Ljava/lang/String;)Lio/netty/util/concurrent/Future;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // io.netty.resolver.SimpleNameResolver this
        start local 1 // java.lang.String inetHost
         0: .line 54
            aload 0 /* this */
            invokevirtual io.netty.resolver.SimpleNameResolver.executor:()Lio/netty/util/concurrent/EventExecutor;
            invokeinterface io.netty.util.concurrent.EventExecutor.newPromise:()Lio/netty/util/concurrent/Promise;
            astore 2 /* promise */
        start local 2 // io.netty.util.concurrent.Promise promise
         1: .line 55
            aload 0 /* this */
            aload 1 /* inetHost */
            aload 2 /* promise */
            invokevirtual io.netty.resolver.SimpleNameResolver.resolve:(Ljava/lang/String;Lio/netty/util/concurrent/Promise;)Lio/netty/util/concurrent/Future;
            areturn
        end local 2 // io.netty.util.concurrent.Promise promise
        end local 1 // java.lang.String inetHost
        end local 0 // io.netty.resolver.SimpleNameResolver this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lio/netty/resolver/SimpleNameResolver<TT;>;
            0    2     1  inetHost  Ljava/lang/String;
            1    2     2   promise  Lio/netty/util/concurrent/Promise<TT;>;
    Signature: (Ljava/lang/String;)Lio/netty/util/concurrent/Future<TT;>;
    MethodParameters:
          Name  Flags
      inetHost  

  public io.netty.util.concurrent.Future<T> resolve(java.lang.String, io.netty.util.concurrent.Promise<T>);
    descriptor: (Ljava/lang/String;Lio/netty/util/concurrent/Promise;)Lio/netty/util/concurrent/Future;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=3
        start local 0 // io.netty.resolver.SimpleNameResolver this
        start local 1 // java.lang.String inetHost
        start local 2 // io.netty.util.concurrent.Promise promise
         0: .line 60
            aload 2 /* promise */
            ldc "promise"
            invokestatic io.netty.util.internal.ObjectUtil.checkNotNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         1: .line 63
            aload 0 /* this */
            aload 1 /* inetHost */
            aload 2 /* promise */
            invokevirtual io.netty.resolver.SimpleNameResolver.doResolve:(Ljava/lang/String;Lio/netty/util/concurrent/Promise;)V
         2: .line 64
            aload 2 /* promise */
         3: areturn
         4: .line 65
      StackMap locals:
      StackMap stack: java.lang.Exception
            astore 3 /* e */
        start local 3 // java.lang.Exception e
         5: .line 66
            aload 2 /* promise */
            aload 3 /* e */
            invokeinterface io.netty.util.concurrent.Promise.setFailure:(Ljava/lang/Throwable;)Lio/netty/util/concurrent/Promise;
            areturn
        end local 3 // java.lang.Exception e
        end local 2 // io.netty.util.concurrent.Promise promise
        end local 1 // java.lang.String inetHost
        end local 0 // io.netty.resolver.SimpleNameResolver this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    6     0      this  Lio/netty/resolver/SimpleNameResolver<TT;>;
            0    6     1  inetHost  Ljava/lang/String;
            0    6     2   promise  Lio/netty/util/concurrent/Promise<TT;>;
            5    6     3         e  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
           1     3       4  Class java.lang.Exception
    Signature: (Ljava/lang/String;Lio/netty/util/concurrent/Promise<TT;>;)Lio/netty/util/concurrent/Future<TT;>;
    MethodParameters:
          Name  Flags
      inetHost  
      promise   

  public final io.netty.util.concurrent.Future<java.util.List<T>> resolveAll(java.lang.String);
    descriptor: (Ljava/lang/String;)Lio/netty/util/concurrent/Future;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // io.netty.resolver.SimpleNameResolver this
        start local 1 // java.lang.String inetHost
         0: .line 72
            aload 0 /* this */
            invokevirtual io.netty.resolver.SimpleNameResolver.executor:()Lio/netty/util/concurrent/EventExecutor;
            invokeinterface io.netty.util.concurrent.EventExecutor.newPromise:()Lio/netty/util/concurrent/Promise;
            astore 2 /* promise */
        start local 2 // io.netty.util.concurrent.Promise promise
         1: .line 73
            aload 0 /* this */
            aload 1 /* inetHost */
            aload 2 /* promise */
            invokevirtual io.netty.resolver.SimpleNameResolver.resolveAll:(Ljava/lang/String;Lio/netty/util/concurrent/Promise;)Lio/netty/util/concurrent/Future;
            areturn
        end local 2 // io.netty.util.concurrent.Promise promise
        end local 1 // java.lang.String inetHost
        end local 0 // io.netty.resolver.SimpleNameResolver this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lio/netty/resolver/SimpleNameResolver<TT;>;
            0    2     1  inetHost  Ljava/lang/String;
            1    2     2   promise  Lio/netty/util/concurrent/Promise<Ljava/util/List<TT;>;>;
    Signature: (Ljava/lang/String;)Lio/netty/util/concurrent/Future<Ljava/util/List<TT;>;>;
    MethodParameters:
          Name  Flags
      inetHost  

  public io.netty.util.concurrent.Future<java.util.List<T>> resolveAll(java.lang.String, io.netty.util.concurrent.Promise<java.util.List<T>>);
    descriptor: (Ljava/lang/String;Lio/netty/util/concurrent/Promise;)Lio/netty/util/concurrent/Future;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=3
        start local 0 // io.netty.resolver.SimpleNameResolver this
        start local 1 // java.lang.String inetHost
        start local 2 // io.netty.util.concurrent.Promise promise
         0: .line 78
            aload 2 /* promise */
            ldc "promise"
            invokestatic io.netty.util.internal.ObjectUtil.checkNotNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         1: .line 81
            aload 0 /* this */
            aload 1 /* inetHost */
            aload 2 /* promise */
            invokevirtual io.netty.resolver.SimpleNameResolver.doResolveAll:(Ljava/lang/String;Lio/netty/util/concurrent/Promise;)V
         2: .line 82
            aload 2 /* promise */
         3: areturn
         4: .line 83
      StackMap locals:
      StackMap stack: java.lang.Exception
            astore 3 /* e */
        start local 3 // java.lang.Exception e
         5: .line 84
            aload 2 /* promise */
            aload 3 /* e */
            invokeinterface io.netty.util.concurrent.Promise.setFailure:(Ljava/lang/Throwable;)Lio/netty/util/concurrent/Promise;
            areturn
        end local 3 // java.lang.Exception e
        end local 2 // io.netty.util.concurrent.Promise promise
        end local 1 // java.lang.String inetHost
        end local 0 // io.netty.resolver.SimpleNameResolver this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    6     0      this  Lio/netty/resolver/SimpleNameResolver<TT;>;
            0    6     1  inetHost  Ljava/lang/String;
            0    6     2   promise  Lio/netty/util/concurrent/Promise<Ljava/util/List<TT;>;>;
            5    6     3         e  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
           1     3       4  Class java.lang.Exception
    Signature: (Ljava/lang/String;Lio/netty/util/concurrent/Promise<Ljava/util/List<TT;>;>;)Lio/netty/util/concurrent/Future<Ljava/util/List<TT;>;>;
    MethodParameters:
          Name  Flags
      inetHost  
      promise   

  protected abstract void doResolve(java.lang.String, io.netty.util.concurrent.Promise<T>);
    descriptor: (Ljava/lang/String;Lio/netty/util/concurrent/Promise;)V
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    Exceptions:
      throws java.lang.Exception
    Signature: (Ljava/lang/String;Lio/netty/util/concurrent/Promise<TT;>;)V
    MethodParameters:
          Name  Flags
      inetHost  
      promise   

  protected abstract void doResolveAll(java.lang.String, io.netty.util.concurrent.Promise<java.util.List<T>>);
    descriptor: (Ljava/lang/String;Lio/netty/util/concurrent/Promise;)V
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    Exceptions:
      throws java.lang.Exception
    Signature: (Ljava/lang/String;Lio/netty/util/concurrent/Promise<Ljava/util/List<TT;>;>;)V
    MethodParameters:
          Name  Flags
      inetHost  
      promise   

  public void close();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=1, args_size=1
        start local 0 // io.netty.resolver.SimpleNameResolver this
         0: .line 99
            return
        end local 0 // io.netty.resolver.SimpleNameResolver this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/resolver/SimpleNameResolver<TT;>;
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;Lio/netty/resolver/NameResolver<TT;>;
SourceFile: "SimpleNameResolver.java"