Optional ReadonlybucketId?: neverOptional ReadonlybucketIds?: readonly BucketId[] | nullOptional bucket restrictions. A bucket list restricts the key to those buckets; null or omitted grants access to all buckets.
ReadonlybucketId: BucketIdSingle-bucket restriction.
Optional ReadonlybucketIds?: neverDo not provide bucketIds with the deprecated bucketId alias.
Mutually exclusive bucket scope fields for key creation.