From 70a9c1ece1542117cc0e8a15bc03a2eb005cfd1f Mon Sep 17 00:00:00 2001
From: Cory Hall <43035978+corymhall@users.noreply.github.com>
Date: Tue, 6 Dec 2022 10:18:44 -0500
Subject: [PATCH] chore(core): fix bootstrapQualifier (#23246)

----

### All Submissions:

* [ ] Have you followed the guidelines in our [Contributing guide?](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md)

### Adding new Construct Runtime Dependencies:

* [ ] This PR adds new construct runtime dependencies following the process described [here](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md/#adding-construct-runtime-dependencies)

### New Features

* [ ] Have you added the new feature to an [integration test](https://github.com/aws/aws-cdk/blob/main/INTEGRATION_TESTS.md)?
	* [ ] Did you use `yarn integ` to deploy the infrastructure and generate the snapshot (i.e. `yarn integ` without `--dry-run`)?

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
---
 packages/@aws-cdk/core/lib/stack-synthesizers/nested.ts  | 9 ++++-----
 .../core/lib/stack-synthesizers/stack-synthesizer.ts     | 8 ++++++++
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/packages/@aws-cdk/core/lib/stack-synthesizers/nested.ts b/packages/@aws-cdk/core/lib/stack-synthesizers/nested.ts
index 6ccccacc5062b..1350ad1d7f1a3 100644
--- a/packages/@aws-cdk/core/lib/stack-synthesizers/nested.ts
+++ b/packages/@aws-cdk/core/lib/stack-synthesizers/nested.ts
@@ -11,13 +11,12 @@ import { IStackSynthesizer, ISynthesisSession } from './types';
  * App builder do not need to use this class directly.
  */
 export class NestedStackSynthesizer extends StackSynthesizer {
-  /**
-   * The qualifier used to bootstrap this stack
-   */
-  public readonly bootstrapQualifier?: string;
   constructor(private readonly parentDeployment: IStackSynthesizer) {
     super();
-    this.bootstrapQualifier = parentDeployment.bootstrapQualifier;
+  }
+
+  public get bootstrapQualifier(): string | undefined {
+    return this.parentDeployment.bootstrapQualifier;
   }
 
   public addFileAsset(asset: FileAssetSource): FileAssetLocation {
diff --git a/packages/@aws-cdk/core/lib/stack-synthesizers/stack-synthesizer.ts b/packages/@aws-cdk/core/lib/stack-synthesizers/stack-synthesizer.ts
index 311a648561bd3..51b0b66e0774a 100644
--- a/packages/@aws-cdk/core/lib/stack-synthesizers/stack-synthesizer.ts
+++ b/packages/@aws-cdk/core/lib/stack-synthesizers/stack-synthesizer.ts
@@ -19,6 +19,14 @@ import { IStackSynthesizer, ISynthesisSession } from './types';
  * and could not be accessed by external implementors.
  */
 export abstract class StackSynthesizer implements IStackSynthesizer {
+
+  /**
+   * The qualifier used to bootstrap this stack
+   */
+  public get bootstrapQualifier(): string | undefined {
+    return undefined;
+  }
+
   private _boundStack?: Stack;
 
   /**