How to apply CustomSynthesizer at app level ?

[kodemuseGit]

Hello All,

I am using aws cdk toolkit to deploy resources on AWS. While working on project, I faced a use case where I need to built my own bootstrap.yml and in this file S3 bucket name has been changed. This part is working fine.
But when I am trying to use this S3 bucket name then I got to know that I have to override the DefaultStackSynthesizer option.
I did that and it works fine with 1 stack. But when I am trying to use same DefaultStackSynthesizer with other stack then it gives me error.
Which also fine that, because as per #11528 this we should not same Synthesizer for more then 1 stack. Following piece of code is working fine. But my question is, In my project I have 100s of Stack. is there any easy way to registered this Synthesizer at 1 place.

**let defaultStackSynth = new DefaultStackSynthesizer({
fileAssetsBucketName: 'cdk-demo-bucket-123',
})

new SNSStack(app, 'SNSTopic', {
synthesizer: defaultStackSynth,
});**