   request.mutations.append(mutation)
   
   let result = try service.commit(request)
-  print("\(result)")
+
+  for mutationResult in result.mutationResults {
+    print("\(mutationResult)")
+  }
+}
+
+func runDelete(service: Google_Datastore_V1_DatastoreService,
+               kind: String,
+               id: Int64) throws {
+  var request = Google_Datastore_V1_CommitRequest()
+  request.projectID = projectID
+  request.mode = .nonTransactional
+  var pathElement = Google_Datastore_V1_Key.PathElement()
+  pathElement.kind = kind
+  pathElement.id = id
+  var key = Google_Datastore_V1_Key()
+  key.path = [pathElement]
+  var mutation = Google_Datastore_V1_Mutation()
+  mutation.delete = key
+  request.mutations.append(mutation)
+  let result = try service.commit(request)
+  for mutationResult in result.mutationResults {
+    print("\(mutationResult)")
+  }
 }
 
 func prepareService() throws -> Google_Datastore_V1_DatastoreService? {

  return service
}

func insert(number: Int) throws {
  if let service = try prepareService() {
    try runInsert(service:service, number:number)
  }
}

func query() throws {
  if let service = try prepareService() {
    try runSelectQuery(service:service)
  }
}

Group {
  $0.command("insert") { (number:Int) in
    try insert(number:number)
  }
  
  $0.command("query") {
    try query()
  }
  
  }.run()

  var request = Google_Datastore_V1_RunQueryRequest()
  request.projectID = projectID
  var query = Google_Datastore_V1_GqlQuery()
  query.queryString = "select * from Thing"
  request.gqlQuery = query
  let result = try service.runquery(request)
  var entities : [Thing] = []
  for entityResult in result.batch.entityResults {
    var properties : [String:Any] = [:]
    for property in entityResult.entity.properties {
      let key = property.key
      switch property.value.valueType! {
      case .integerValue(let v):
        properties[key] = v
      case .stringValue(let v):
        properties[key] = v
      default:
        print("?")
      }
    }
    let entity = try PropertiesDecoder.decode(Thing.self, from:properties)
    entities.append(entity)
  }
  print("\(entities)")
}

func runInsert(service: Google_Datastore_V1_DatastoreService,
