/**
  * An expectation for checking if the given element is selected.
  *
  * @param mixed element_or_by Either the element or the locator.
  * @return WebDriverExpectedCondition<bool> whether the element is selected.
  */
 public static function elementToBeSelected($element_or_by)
 {
     return WebDriverExpectedCondition::elementSelectionStateToBe($element_or_by, true);
 }