@Override
  public boolean processRemovedClass(DifferentiateContext context, JvmClass removedClass, Utils future, Utils present) {
    debug("Adding usages of removed class ", removedClass.getName());
    context.affectUsage(new ClassUsage(removedClass.getReferenceID()));
    return true;
  }
@Override
  public boolean processRemovedClass(DifferentiateContext context, JvmClass removedClass, Utils future, Utils present)