arangosh> var rel = graph_module._relation("isCustomer", ["shop"], ["customer"]); arangosh> graph._extendEdgeDefinitions(rel); arangosh> graph; {[Graph] "isCustomer" : [ArangoCollection 18845, "isCustomer" (type edge, status loaded)], "shop" : [ArangoCollection 18837, "shop" (type document, status loaded)], "customer" : [ArangoCollection 18841, "customer" (type document, status loaded)], "pet" : [ArangoCollection 18829, "pet" (type document, status loaded)] }