src/main/java/org/openqa/selenium/htmlunit/HtmlUnitAlert.java
void close() {
    lock.lock();
    condition.signal();
    setAutoAccept(true);
    lock.unlock();
    holder_ = null;
  }
void close() {
    lock.lock();
    condition.signal();
    setAutoAccept(true);
    lock.unlock();
    holder_ = null;
  }
Closes the current window.