How can an 'after:deploy' plugin get the AWS Lambda ARN?

I want to write a plugin that is invoked after the lambdas have been deployed.
The plugin needs the ARN of the deployed lambdas.
It could just construct an ARN through string concatenation (assuming it has access to the account id).

However, it would ‘cleaner’ to get that information from serverless.
Any suggestions on an easy way to do that?
For example, Is there a way to invoke plugins/aws/info/getStackInfo.js or is copy/paste the answer?

Thanks in advance.