code: @Override
    public Class loadClass(String name) throws ClassNotFoundException {
  
      if (bestCandidate != null) {
        try {
          return bestCandidate.loadClass(name);
        } catch (Throwable t) {
          bestCandidate = null;
        }
      }
  
      Throwable throwable = null;
      Class clazz = null;
      ClassLoadHelper loadHelper = null;
  
      Iterator<ClassLoadHelper> iter = loadHelpers.iterator();
      while (iter.hasNext()) {
        loadHelper = iter.next();
  
        try {
          clazz = loadHelper.loadClass(name);
          break;
        } catch (Throwable t) {
          throwable = t;
        }
      }
  
      if (clazz == null) {
        if (throwable instanceof ClassNotFoundException) {
          throw (ClassNotFoundException) throwable;
        } else {
          throw new ClassNotFoundException(
              String.format("Unable to load class %s by any known loaders.", name), throwable);
        }
      }
  
      bestCandidate = loadHelper;
  
      return clazz;
    }
docs: Return the class with the given name.