docs: public WebDriver innerFrame(String... frames) {
      delegate.defaultContent();
  
      for (String frame : frames) {
        try {
          String selector = String.format("frame#%1$s,frame[name=%1$s],iframe#%1$s,iframe[name=%1$s]", frame);
          Wait().until(frameToBeAvailableAndSwitchToIt_fixed(By.cssSelector(selector)));
        }
        catch (NoSuchElementException | TimeoutException e) {
          throw new NoSuchFrameException("No frame found with id/name = " + frame, e);
        }
      }
  
      return webDriver;
    }