/**
  * Create a concurrent modification exception with a cause and a default message.
  *
  * @param cause The cause.
  */
 public ConcurrentModificationException(Throwable cause) {
   super(ERR_CONCURRENT_MODIFICATION_EXCEPTION_DEFAULT.get(), cause);
 }
 /** Create a concurrent modification exception with a default message. */
 public ConcurrentModificationException() {
   super(ERR_CONCURRENT_MODIFICATION_EXCEPTION_DEFAULT.get());
 }