gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_3_9/property-v2d0-partial.json

{
  "@type" : "g:Property",
  "@value" : {
    "key" : "since",
    "value" : {
      "@type" : "g:Int32",
      "@value" : 2009
    }
  }
}