> **Experimental**
>
> `@aws-cdk/app-staging-synthesizer-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# UsingAppStagingSynthesizer

This is a dummy construct meant to signify that a stack is utilizing the AppStagingSynthesizer.

It does not do anything, and is not meant
to be created on its own. This construct will be a part of the
construct tree only and not the Cfn template. The construct tree is
then encoded in the AWS::CDK::Metadata resource of the stack and
injested in our metrics like every other construct.

Extends: Construct › UsingAppStagingSynthesizer
Implements: IConstruct, IDependable

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/default-staging-stack.ts`](https://github.com/aws/aws-cdk/blob/v2.276.0-alpha.0/packages/@aws-cdk/app-staging-synthesizer-alpha/lib/default-staging-stack.ts#L38)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as app_staging_synthesizer_alpha from '@aws-cdk/app-staging-synthesizer-alpha';
const usingAppStagingSynthesizer = new app_staging_synthesizer_alpha.UsingAppStagingSynthesizer(this, 'MyUsingAppStagingSynthesizer');
```

## Initializer

```ts
new UsingAppStagingSynthesizer(scope: Construct, id: string)
```

## Properties

- `node`: [Node](/cdk/api/v2/docs/constructs.Node.html) — The tree node.

## Methods

- `isConstruct(x: any): boolean` (static) — Checks if `x` is a construct.

  Use this method instead of `instanceof` to properly detect `Construct`
  instances, even when the construct library is symlinked.

  Explanation: in JavaScript, multiple copies of the `constructs` library on
  disk are seen as independent, completely different libraries. As a
  consequence, the class `Construct` in each copy of the `constructs` library
  is seen as a different class, and an instance of one class will not test as
  `instanceof` the other class. `npm install` will not create installations
  like this, but users may manually symlink construct libraries together or
  use a monorepo tool: in those cases, multiple copies of the `constructs`
  library can be accidentally installed, and `instanceof` will behave
  unpredictably. It is safest to avoid using `instanceof`, and using
  this type-testing method instead.

  **Parameters**

  - `x` — Any object.

  **Returns:** true if `x` is an object created from a class which extends `Construct`.

- `toString(): string` — Returns a string representation of this construct.

- `with(...mixins: IMixin[]): IConstruct` — Applies one or more mixins to this construct.

  Mixins are applied in order. The list of constructs is captured at the
  start of the call, so constructs added by a mixin will not be visited.
  Use multiple `with()` calls if subsequent mixins should apply to added
  constructs.

  **Parameters**

  - `mixins` — The mixins to apply.

  **Returns:** This construct for chaining