gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_3_9/edge-v1d0.json

{
  "id" : 13,
  "label" : "develops",
  "type" : "edge",
  "inVLabel" : "software",
  "outVLabel" : "person",
  "inV" : 10,
  "outV" : 1,
  "properties" : {
    "since" : 2009
  }
}