docs: public static ExpectedCondition<Boolean> not(final ExpectedCondition<?> condition) {
      return new ExpectedCondition<Boolean>() {
        @Override
        public Boolean apply(WebDriver driver) {
          Object result = condition.apply(driver);
          return result == null || result.equals(Boolean.FALSE);
        }
  
        @Override
        public String toString() {
          return "condition to not be valid: " + condition;
        }
      };
    }