public Set<InternalDistributedMember> getBucketOwners(int bucketId) {
    return buckets[bucketId].getBucketOwners();
  }
Return the set of all members who currently own the bucket, including the local owner, if
applicable

@return a set of {@link InternalDistributedMember}s that own the bucket
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/RegionAdvisor.java