Builder used to create Cloud Functions for Test Lab test matrices events.

**Signature:**

    export declare class TestMatrixBuilder 

## Methods

| Method | Modifiers | Description |
|---|---|---|
| [onComplete(handler)](https://firebase.google.com/docs/reference/functions/firebase-functions.testlab.testmatrixbuilder#testlabtestmatrixbuilderoncomplete) |   | Handle a TestMatrix that reached a final test state. |

## testLab.TestMatrixBuilder.onComplete()

Handle a TestMatrix that reached a final test state.

**Signature:**

    onComplete(handler: (testMatrix: TestMatrix, context: EventContext) => PromiseLike<any> | any): CloudFunction<TestMatrix>;

### Parameters

| Parameter | Type | Description |
|---|---|---|
| handler | (testMatrix: [TestMatrix](https://firebase.google.com/docs/reference/functions/firebase-functions.testlab.testmatrix#testlabtestmatrix_class), context: [EventContext](https://firebase.google.com/docs/reference/functions/firebase-functions.eventcontext#eventcontext_interface)) =\> PromiseLike\<any\> \| any |   |

**Returns:**

[CloudFunction](https://firebase.google.com/docs/reference/functions/firebase-functions.cloudfunction#cloudfunction_interface)\<[TestMatrix](https://firebase.google.com/docs/reference/functions/firebase-functions.testlab.testmatrix#testlabtestmatrix_class)\>