https://openjdk.java.net/ 
public interface sun.management.counter.ByteArrayCounter extends sun.management.counter.Counter
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.management.counter.ByteArrayCounter
  super_class: java.lang.Object
{
  public abstract byte[] byteArrayValue();
    descriptor: ()[B
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract byte byteAt(int);
    descriptor: (I)B
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      index  
}
SourceFile: "ByteArrayCounter.java"