https://openjdk.java.net/ 
public interface sun.jvm.hotspot.utilities.BitMapClosure
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.jvm.hotspot.utilities.BitMapClosure
  super_class: java.lang.Object
{
  public abstract void doBit(int);
    descriptor: (I)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      offset  
}
SourceFile: "BitMapClosure.java"