MutableSequence[str]
A list of allowed location names represented by internal
URLs. Each location can be a region or a zone. Only one
region or multiple zones in one region is supported now. For
example, ["regions/us-central1"] allow VMs in any zones in
region us-central1. ["zones/us-central1-a",
"zones/us-central1-c"] only allow VMs in zones us-central1-a
and us-central1-c. All locations end up in different regions
would cause errors. For example, ["regions/us-central1",
"zones/us-central1-a", "zones/us-central1-b",
"zones/us-west1-a"] contains 2 regions "us-central1" and
"us-west1". An error is expected in this case.
