code: public void uncheck(String locator) {
          getDispatcher().beforeUncheck(this, locator);
          
          this.uncheck();
          validatePresenceOfAlert();
          WebDriverWaitUtils.waitUntilElementIsPresent(locator);
          
          getDispatcher().afterUncheck(this, locator);
      }
docs: The CheckBox uncheck function It invokes SeLion session to handle the uncheck action against the element. Waits
  until element is found with given locator.