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.util.concurrent.ImmediateEventExecutor$2 extends io.netty.util.concurrent.FastThreadLocal<java.lang.Boolean>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: io.netty.util.concurrent.ImmediateEventExecutor$2
  super_class: io.netty.util.concurrent.FastThreadLocal
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.util.concurrent.ImmediateEventExecutor$2 this
         0: .line 47
            aload 0 /* this */
            invokespecial io.netty.util.concurrent.FastThreadLocal.<init>:()V
            return
        end local 0 // io.netty.util.concurrent.ImmediateEventExecutor$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/util/concurrent/ImmediateEventExecutor$2;

  protected java.lang.Boolean initialValue();
    descriptor: ()Ljava/lang/Boolean;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.util.concurrent.ImmediateEventExecutor$2 this
         0: .line 50
            iconst_0
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            areturn
        end local 0 // io.netty.util.concurrent.ImmediateEventExecutor$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/util/concurrent/ImmediateEventExecutor$2;
    Exceptions:
      throws java.lang.Exception

  protected java.lang.Object initialValue();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1044) ACC_PROTECTED, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual io.netty.util.concurrent.ImmediateEventExecutor$2.initialValue:()Ljava/lang/Boolean;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    Exceptions:
      throws java.lang.Exception
}
Signature: Lio/netty/util/concurrent/FastThreadLocal<Ljava/lang/Boolean;>;
SourceFile: "ImmediateEventExecutor.java"
EnclosingMethod: io.netty.util.concurrent.ImmediateEventExecutor
NestHost: io.netty.util.concurrent.ImmediateEventExecutor
InnerClasses:
  io.netty.util.concurrent.ImmediateEventExecutor$2