lib/plugins/aws/package/compile/functions/index.js/AwsCompileFunctions/isArnRefGetAttOrImportValue
class AwsCompileFunctions:  isArnRefGetAttOrImportValue(arn) {
    return typeof arn === 'object' &&
      _.some(_.keys(arn), (k) => _.includes(['Ref', 'Fn::GetAtt', 'Fn::ImportValue'], k));
  }