Github user miguelaferreira commented on the pull request:
https://github.com/apache/cloudstack/pull/1056#issuecomment-155679945
We don't need Java 8 to use optional. And yes, optional is meant for
expressing that a value may be present or not. The API is quite clear, I don't
see the confusion.
https://github.com/google/guava/wiki/UsingAndAvoidingNullExplained
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