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 interface io.netty.channel.pool.ChannelHealthChecker
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.netty.channel.pool.ChannelHealthChecker
  super_class: java.lang.Object
{
  public static final io.netty.channel.pool.ChannelHealthChecker ACTIVE;
    descriptor: Lio/netty/channel/pool/ChannelHealthChecker;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 32
            new io.netty.channel.pool.ChannelHealthChecker$1
            dup
            invokespecial io.netty.channel.pool.ChannelHealthChecker$1.<init>:()V
            putstatic io.netty.channel.pool.ChannelHealthChecker.ACTIVE:Lio/netty/channel/pool/ChannelHealthChecker;
         1: .line 38
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public abstract io.netty.util.concurrent.Future<java.lang.Boolean> isHealthy(io.netty.channel.Channel);
    descriptor: (Lio/netty/channel/Channel;)Lio/netty/util/concurrent/Future;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Lio/netty/channel/Channel;)Lio/netty/util/concurrent/Future<Ljava/lang/Boolean;>;
    MethodParameters:
         Name  Flags
      channel  
}
SourceFile: "ChannelHealthChecker.java"
NestMembers:
  io.netty.channel.pool.ChannelHealthChecker$1
InnerClasses:
  io.netty.channel.pool.ChannelHealthChecker$1