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.channel.pool.AbstractChannelPoolHandler implements io.netty.channel.pool.ChannelPoolHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: io.netty.channel.pool.AbstractChannelPoolHandler
  super_class: java.lang.Object
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.channel.pool.AbstractChannelPoolHandler this
         0: .line 23
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // io.netty.channel.pool.AbstractChannelPoolHandler this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/channel/pool/AbstractChannelPoolHandler;

  public void channelAcquired(io.netty.channel.Channel);
    descriptor: (Lio/netty/channel/Channel;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=2, args_size=2
        start local 0 // io.netty.channel.pool.AbstractChannelPoolHandler this
        start local 1 // io.netty.channel.Channel ch
         0: .line 33
            return
        end local 1 // io.netty.channel.Channel ch
        end local 0 // io.netty.channel.pool.AbstractChannelPoolHandler this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/channel/pool/AbstractChannelPoolHandler;
            0    1     1    ch  Lio/netty/channel/Channel;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ch    

  public void channelReleased(io.netty.channel.Channel);
    descriptor: (Lio/netty/channel/Channel;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=2, args_size=2
        start local 0 // io.netty.channel.pool.AbstractChannelPoolHandler this
        start local 1 // io.netty.channel.Channel ch
         0: .line 43
            return
        end local 1 // io.netty.channel.Channel ch
        end local 0 // io.netty.channel.pool.AbstractChannelPoolHandler this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/channel/pool/AbstractChannelPoolHandler;
            0    1     1    ch  Lio/netty/channel/Channel;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ch    
}
SourceFile: "AbstractChannelPoolHandler.java"