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      • Implement the concept of a 'Layout Feature' in Ozone (with sample usage in Ozone Manager), which defines a specific change in on-disk layout in Ozone.
      • Every feature is associated with a layout version, and an API corresponding to the feature cannot be invoked (throws NOT_SUPPORTED_OPERATION) before finalization.
      • Created an annotation based 'aspect' for "guarding" new APIs that are introduced by Layout Features. Check out TestOMLayoutFeatureAspect#testCheckLayoutFeature.
      • Added sample features and tests for ease of review (To be removed before commit).
      • Created an abstract VersionManager and an inherited OM Version manager to initialize features, check if feature is allowed, check need to finalize, do finalization.

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              • Assignee:
                avijayan Aravindan Vijayan
                Reporter:
                avijayan Aravindan Vijayan
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