streaming function returning multiple entities

function increment(amount: number, interval: any, invocation: CustomFunctions.StreamingInvocation<any[][]>): void {
  var Entity1 = {
    type: "Entity",
    basicType: "Error",
    basicValue: "#VALUE!",
    text: "Entity 1",
    properties: {
      TestDouble: { type: "Double", basicType: "Double", basicValue: 1 },
      TestString: { type: "String", basicType: "String", basicValue: "Test" }
    }
  };
  var Entity2 = {
    type: "Entity",
    basicType: "Error",
    basicValue: "#VALUE!",
    text: "Entity 2",
    properties: {
      TestDouble: { type: "Double", basicType: "Double", basicValue: 2 },
      TestString: { type: "String", basicType: "String", basicValue: "Test" }
    }
  };
  let result = [[Entity1], [Entity2]];
  const timer = setInterval(() => {
    Entity1.properties.TestDouble.basicValue += amount;
    Entity2.properties.TestDouble.basicValue += amount
    invocation.setResult(result);
  }, interval);

  invocation.onCanceled = () => {
    clearInterval(timer);
  };
}