Marks objects which are cache-based, and which may contain obsolete cached data.
[InternalApi_DoNotUse_MayChangeWithoutNotice("this is just fyi")] public interface ICacheExpiring : ITimestamped
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Detect if the cache has old data, by comparing it to a timestamp which may be newer.
This is implemented in each object, because sometimes it compares its own timestamp, sometimes that of another underlying object.
bool CacheChanged(long newCacheTimeStamp)
New time stamp to compare with
True if the timestamps differ, false if it's the same