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) 
final class io.netty.channel.group.ChannelMatchers$InstanceMatcher implements io.netty.channel.group.ChannelMatcher
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: io.netty.channel.group.ChannelMatchers$InstanceMatcher
  super_class: java.lang.Object
{
  private final io.netty.channel.Channel channel;
    descriptor: Lio/netty/channel/Channel;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(io.netty.channel.Channel);
    descriptor: (Lio/netty/channel/Channel;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.channel.group.ChannelMatchers$InstanceMatcher this
        start local 1 // io.netty.channel.Channel channel
         0: .line 147
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 148
            aload 0 /* this */
            aload 1 /* channel */
            putfield io.netty.channel.group.ChannelMatchers$InstanceMatcher.channel:Lio/netty/channel/Channel;
         2: .line 149
            return
        end local 1 // io.netty.channel.Channel channel
        end local 0 // io.netty.channel.group.ChannelMatchers$InstanceMatcher this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    3     0     this  Lio/netty/channel/group/ChannelMatchers$InstanceMatcher;
            0    3     1  channel  Lio/netty/channel/Channel;
    MethodParameters:
         Name  Flags
      channel  

  public boolean matches(io.netty.channel.Channel);
    descriptor: (Lio/netty/channel/Channel;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.channel.group.ChannelMatchers$InstanceMatcher this
        start local 1 // io.netty.channel.Channel ch
         0: .line 153
            aload 0 /* this */
            getfield io.netty.channel.group.ChannelMatchers$InstanceMatcher.channel:Lio/netty/channel/Channel;
            aload 1 /* ch */
            if_acmpne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 1 // io.netty.channel.Channel ch
        end local 0 // io.netty.channel.group.ChannelMatchers$InstanceMatcher this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/channel/group/ChannelMatchers$InstanceMatcher;
            0    2     1    ch  Lio/netty/channel/Channel;
    MethodParameters:
      Name  Flags
      ch    
}
SourceFile: "ChannelMatchers.java"
NestHost: io.netty.channel.group.ChannelMatchers
InnerClasses:
  private final InstanceMatcher = io.netty.channel.group.ChannelMatchers$InstanceMatcher of io.netty.channel.group.ChannelMatchers