pekuz commented on pull request #2629:
URL: https://github.com/apache/netbeans/pull/2629#issuecomment-800154920


   There is a strange asymmetry in the provider interfaces: 
     - get parent can return null 
     - get root can not return null 
     
   Assuming a root should be reachable by traversing parents chain then 
allowing the null in the parents chain but not allowing the null for the root 
itself smells.
     


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