SharedPreferences.getStringSet() not found?

There's something that I don't understand with SharedPreference.

In this document it says that the getStringSet() method is supported from开发者_运维知识库 API 1. But I found no method like that. I use API 8 for my apps. What's happening here? Is it not supported anymore?

ps : There's no difference with the SharedPreference.Editor. There's no putStringSet() in the editor class.

screenshot : look.. no getStringSet()

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public abstract Set getStringSet (String key, Set defValues) Since: API Level 11

In the typeface they use I often mistake the 11 for a 1, too.