public static boolean isProxyClass(Class<?> cl){
  if (cl == null) {
    throw new NullPointerException("cl == null");
  }
synchronized (proxyCache) {
    return proxyCache.containsKey(cl);
  }
}

public static boolean isProxyClass ( Class < ? > cl ) { if ( cl == null ) { throw new NullPointerException ( "cl == null" ) ; } synchronized ( proxyCache ) { return proxyCache . containsKey ( cl ) ; } }
indicates whether or not the specified class is a dynamically generated proxy class .
