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) 
class io.netty.channel.group.ChannelMatchers$1 implements io.netty.channel.group.ChannelMatcher
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: io.netty.channel.group.ChannelMatchers$1
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.channel.group.ChannelMatchers$1 this
         0: .line 26
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // io.netty.channel.group.ChannelMatchers$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/channel/group/ChannelMatchers$1;

  public boolean matches(io.netty.channel.Channel);
    descriptor: (Lio/netty/channel/Channel;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // io.netty.channel.group.ChannelMatchers$1 this
        start local 1 // io.netty.channel.Channel channel
         0: .line 29
            iconst_1
            ireturn
        end local 1 // io.netty.channel.Channel channel
        end local 0 // io.netty.channel.group.ChannelMatchers$1 this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lio/netty/channel/group/ChannelMatchers$1;
            0    1     1  channel  Lio/netty/channel/Channel;
    MethodParameters:
         Name  Flags
      channel  
}
SourceFile: "ChannelMatchers.java"
EnclosingMethod: io.netty.channel.group.ChannelMatchers
NestHost: io.netty.channel.group.ChannelMatchers
InnerClasses:
  io.netty.channel.group.ChannelMatchers$1