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Descrizione
📚 Describe the documentation issue
There is an example for how to use HANConv to do node classification: https://github.com/pyg-team/pytorch_geometric/blob/master/examples/hetero/han_imdb.py, and we also have an example for how to do link prediction with heterogeneous graph: https://github.com/pyg-team/pytorch_geometric/blob/master/examples/hetero/hetero_link_pred.py.
However, we have to do different transformations in the two examples. It is tricky to figure out how to do link prediction with HANConv.
Suggest a potential alternative/fix
I would suggest to have an example showing how to do link prediction with HANConv, especially how to do T.RandomLinkSplit and T.AddMetaPaths together.