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) 
interface io.netty.channel.ChannelFlushPromiseNotifier$FlushCheckpoint
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.netty.channel.ChannelFlushPromiseNotifier$FlushCheckpoint
  super_class: java.lang.Object
{
  public abstract long flushCheckpoint();
    descriptor: ()J
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void flushCheckpoint(long);
    descriptor: (J)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
            Name  Flags
      checkpoint  

  public abstract io.netty.channel.ChannelPromise promise();
    descriptor: ()Lio/netty/channel/ChannelPromise;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "ChannelFlushPromiseNotifier.java"
NestHost: io.netty.channel.ChannelFlushPromiseNotifier
InnerClasses:
  abstract FlushCheckpoint = io.netty.channel.ChannelFlushPromiseNotifier$FlushCheckpoint of io.netty.channel.ChannelFlushPromiseNotifier