code: def create_bucket(self, instance, bucket_name):
          
          req = rest_pb2.CreateBucketRequest()
          req.name = bucket_name
          url = '/buckets/{}'.format(instance)
          self._client.post_proto(url, data=req.SerializeToString())
docs: Create a new bucket in the specified instance.
  
          :param str instance: A Yamcs instance name.
          :param str bucket_name: The name of the bucket.