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Example of using `union` combinator in gremlin-scala.
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| val g = TinkerFactory.createModern().asScala | |
| val Age = Key[Vertex]("age") | |
| val Lang = Key[Vertex]("lang") | |
| val trav = g.V(4) | |
| .union( | |
| GremlinScala(__[Vertex]).in().value(Age), | |
| GremlinScala(__[Vertex]).out().value(Lang) | |
| ).path() | |
| trav.toList.mkString("\n") | |
| // res35: String = | |
| // [v[4], v[1], 29] | |
| // [v[4], v[5], java] | |
| // [v[4], v[3], java] | |
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