code: public String[] getSelectOptions() {
          List<WebElement> optionList = getElement().findElements(By.tagName("option"));
          String[] optionArray = new String[optionList.size()];
          for (int i = 0; i < optionList.size(); i++) {
              optionArray[i] = optionList.get(i).getText();
          }
          return optionArray;
      }
docs: Returns all options currently selected.
  
  @return All options currently selected.