In this example, the returned value was converted from Object to String, since we knew its type ahead of time.
在这个示例中，由于我们提前知道了返回值的类型，因此我们把它从object转化成了String。
The most critical step toward delivering DBaaS that truly brings value to your end users is to decide ahead of time what type of database templates and images should be made available on the cloud.
要交付能真正为您的终端用户带来价值的 DBaaS，最关键的一步是提前决定应该在云环境上提供哪些类型的数据库模板和映像。
This is really the only part that you need to implement every time you want to add a type-ahead feature.
这就是您增加预输入特性所要实现的。
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