code: public static Class<?> getPluginClass(final String pluginClass, URLClassLoader urlClassLoader) {
  
      if (urlClassLoader == null) {
        return null;
      }
  
      try {
        return urlClassLoader.loadClass(pluginClass);
      } catch (final ClassNotFoundException e) {
        logger.error("Class not found. class = " + pluginClass);
        return null;
      }
    }
docs: Get Plugin Class
  
  @param pluginClass plugin class name
  @param urlClassLoader url class loader
  @return Plugin class or Null