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 final class io.netty.util.internal.OutOfDirectMemoryError extends java.lang.OutOfMemoryError
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: io.netty.util.internal.OutOfDirectMemoryError
  super_class: java.lang.OutOfMemoryError
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 4228264016184011555

  void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.util.internal.OutOfDirectMemoryError this
        start local 1 // java.lang.String s
         0: .line 28
            aload 0 /* this */
            aload 1 /* s */
            invokespecial java.lang.OutOfMemoryError.<init>:(Ljava/lang/String;)V
         1: .line 29
            return
        end local 1 // java.lang.String s
        end local 0 // io.netty.util.internal.OutOfDirectMemoryError this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/util/internal/OutOfDirectMemoryError;
            0    2     1     s  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      s     
}
SourceFile: "OutOfDirectMemoryError.java"