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For all I can tell, there is currently no built-in precondition/advisor available that would enforce this.
It would be possible to create a custom precondition.
Note that it would depend on the link type you want to enforce if this is going to be reliable. As far as I know, some of the cross domain link types such as tracks/contributes to will not trigger the work item save precondition when they are created or removed. So it would be possible that a user removes such a link and the advisor would not notice. This was what I have seen when I prototyped such an advisor for the tracks/contributes to link type.
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can you please share the related links if you have handy pls
Start here: https://rsjazz.wordpress.com/2015/09/30/learning-to-fly-getting-started-with-the-rtc-java-apis/ follow the links and perform the extensions workshop. Links for the API you need can be found on the blog https://rsjazz.wordpress.com