code: def _get_prefix_from_bucket_config(self, config):
      pass
  
imports: import abc
  import warnings
  from copy import copy
  from operator import itemgetter
  from os import getenv
  import furl
  import six
  from attr import attrib, attrs
label_desc: Use image node_id 3 for calling the BaseBucketConfigurations obj's underlying member method code with example usage: obj._get_prefix_from_bucket_config(config) without return types