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.internal.SocketUtils$13 implements java.security.PrivilegedExceptionAction<byte[]>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: io.netty.util.internal.SocketUtils$13
  super_class: java.lang.Object
{
  private final java.net.NetworkInterface val$intf;
    descriptor: Ljava/net/NetworkInterface;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(java.net.NetworkInterface);
    descriptor: (Ljava/net/NetworkInterface;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.util.internal.SocketUtils$13 this
         0: .line 203
            aload 0 /* this */
            aload 1
            putfield io.netty.util.internal.SocketUtils$13.val$intf:Ljava/net/NetworkInterface;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // io.netty.util.internal.SocketUtils$13 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/util/internal/SocketUtils$13;
    MethodParameters:
          Name  Flags
      val$intf  final

  public byte[] run();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.util.internal.SocketUtils$13 this
         0: .line 206
            aload 0 /* this */
            getfield io.netty.util.internal.SocketUtils$13.val$intf:Ljava/net/NetworkInterface;
            invokevirtual java.net.NetworkInterface.getHardwareAddress:()[B
            areturn
        end local 0 // io.netty.util.internal.SocketUtils$13 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/util/internal/SocketUtils$13;
    Exceptions:
      throws java.net.SocketException

  public java.lang.Object run();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual io.netty.util.internal.SocketUtils$13.run:()[B
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    Exceptions:
      throws java.lang.Exception
}
Signature: Ljava/lang/Object;Ljava/security/PrivilegedExceptionAction<[B>;
SourceFile: "SocketUtils.java"
EnclosingMethod: io.netty.util.internal.SocketUtils.hardwareAddressFromNetworkInterface:(Ljava/net/NetworkInterface;)[B
NestHost: io.netty.util.internal.SocketUtils
InnerClasses:
  io.netty.util.internal.SocketUtils$13