Vector indexes

write_batch()
    .var_as(
        "index",
        g().create_vector_index_nodes(
            "Doc",
            "embedding",
            std::num::NonZeroUsize::new(3).expect("non-zero dimension"),
            VectorDistanceMetric::Cosine,
            None::<&str>,
        ),
    )
    .returning(["index"]);

writeBatch()
  .varAs(
    "index",
    g().createVectorIndexNodes(
      "Doc",
      "embedding",
      3,
      VectorDistanceMetric.Cosine,
      null,
    ),
  )
  .returning(["index"]);

helix.WriteQuery("create_doc_vector_index").
	VarAs(
		"index",
		helix.G().CreateVectorIndexNodes(
			"Doc",
			"embedding",
			3,
			helix.VectorDistanceCosine,
		),
	).
	Returning("index")

(
    write_batch()
    .var_as(
        "index",
        g().create_vector_index_nodes(
            "Doc",
            "embedding",
            3,
            VectorDistanceMetric.COSINE,
        ),
    )
    .returning(["index"])
)

{
  "request_type": "write",
  "query_name": "create_doc_vector_index",
  "query": {
    "write": {
      "entries": [{
        "query": {
          "name": "index",
          "root": {
            "create_index": {
              "spec": {
                "node_vector": {
                  "label": "Doc",
                  "property": "embedding",
                  "dimension": 3,
                  "metric": "cosine"
                }
              },
              "if_not_exists": true
            }
          }
        }
      }],
      "returns": ["index"]
    }
  }
}