Nothing is done on this issue and was closed by oversight/mistake.
The issue as it currently stands has no resolution.
The implementation artifacts are available at runtime to achieve this goal.
But what is unclear is the usage point of view for such a feature. It appears that such a feature should provide support more at design-time rather than at runtime. However the current JPA programming model is entirely based on runtime artifacts and has absolutely no design-time utility API. Unless that larger issue is addressed, it is not advisable to approach this specific problem in isolation.