I create language that contains concepts:
RepositoryForA contains many concept A.
RepositoryForA is root concept.
Concept B is a root concept and have reference to one concept A that is stored in RepositoryForA.
In sandbox I create node for B.
When I create property in node B that is reference to concept A I want to create new concept A in RepositoryForA and make reference.
How to do that:
1. if in sandbox I don't have RepositoryForA node.
2. if I have RepositoryForA node.