gsutil cp missing --parents

gsutil cp does not offer the --parents flag.
for example, doing `gsutil cp gs://my-bucket/**/pom.xml .` will end up with only one file on disk rather than all of the pom.xml files in the bucket. I would like to have `cp` preserve the parents of each copied file as in `cp --parents` on GNU cp.

Achieving this functionality by copying one by one and specifying the destination from outside gsutil is possible but slow.