https://openjdk.java.net/ 
public interface sun.jvm.hotspot.tools.jcore.ClassFilter
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.jvm.hotspot.tools.jcore.ClassFilter
  super_class: java.lang.Object
{
  public abstract boolean canInclude(sun.jvm.hotspot.oops.InstanceKlass);
    descriptor: (Lsun/jvm/hotspot/oops/InstanceKlass;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      kls   
}
SourceFile: "ClassFilter.java"