WebDriverWait.and, or用法

1. And 用法

wait.until(ExpectedConditions.and(          ExpectedConditions.visibilityOfAllElementsLocatedBy(By.name("Services")),              ExpectedConditions.visibilityOfAllElementsLocatedBy(By.name("Products"))
 )
);

2. Or 用法

wait.until(
              ExpectedConditions.or(
                   ExpectedConditions.visibilityOfAllElementsLocatedBy(By.name("Services")),
                   ExpectedConditions.visibilityOfAllElementsLocatedBy(By.name("Products"))
                   ExpectedConditions.visibilityOfAllElementsLocatedBy(By.name("Contact Us"))
              )
          );