Add methods for checkboxes and radio buttons
self.is_selected(selector, by=By.CSS_SELECTOR, timeout=None)
# Duplicates: self.is_checked(selector, by=By.CSS_SELECTOR, timeout=None)
self.select_if_unselected(selector, by=By.CSS_SELECTOR)
# Duplicates: self.check_if_unchecked(selector, by=By.CSS_SELECTOR)
self.unselect_if_selected(selector, by=By.CSS_SELECTOR)
# Duplicates: self.uncheck_if_checked(selector, by=By.CSS_SELECTOR)