feat: add undirected edges to network motif finding #501
Description
The only type of edge atm that is valid is (a)-[e1]->(b) and I would like to add support for (a)-[e1]-(b) in GraphFrame.find().
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The only type of edge atm that is valid is (a)-[e1]->(b) and I would like to add support for (a)-[e1]-(b) in GraphFrame.find().