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.channel.ChannelPromiseAggregator extends io.netty.util.concurrent.PromiseAggregator<java.lang.Void, io.netty.channel.ChannelFuture> implements io.netty.channel.ChannelFutureListener
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: io.netty.channel.ChannelPromiseAggregator
  super_class: io.netty.util.concurrent.PromiseAggregator
{
  public void <init>(io.netty.channel.ChannelPromise);
    descriptor: (Lio/netty/channel/ChannelPromise;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.channel.ChannelPromiseAggregator this
        start local 1 // io.netty.channel.ChannelPromise aggregatePromise
         0: .line 35
            aload 0 /* this */
            aload 1 /* aggregatePromise */
            invokespecial io.netty.util.concurrent.PromiseAggregator.<init>:(Lio/netty/util/concurrent/Promise;)V
         1: .line 36
            return
        end local 1 // io.netty.channel.ChannelPromise aggregatePromise
        end local 0 // io.netty.channel.ChannelPromiseAggregator this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    2     0              this  Lio/netty/channel/ChannelPromiseAggregator;
            0    2     1  aggregatePromise  Lio/netty/channel/ChannelPromise;
    MethodParameters:
                  Name  Flags
      aggregatePromise  
}
Signature: Lio/netty/util/concurrent/PromiseAggregator<Ljava/lang/Void;Lio/netty/channel/ChannelFuture;>;Lio/netty/channel/ChannelFutureListener;
SourceFile: "ChannelPromiseAggregator.java"
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()