Summary: 4 instances, 4 unique

Text	Count
// TODO: implement it if necessary	1
//TODO: use `Distribution` when https://github.com/aws/aws-cdk/issues/13584 is resolved	1
//TODO: improve this tricky for DnsValidatedCertificate's validate	1
// TODO: update it when https://github.com/aws/aws-cdk/issues/11100 is resolved	1