docs: def store_object(self, obj_name, data, content_type=None, etag=None,
              content_encoding=None, ttl=None, return_none=False,
              headers=None, extra_info=None):
          """
          Creates a new object in this container, and populates it with the given
          data. A StorageObject reference to the uploaded file will be returned,
          unless 'return_none' is set to True.
  
          The 'extra_info' parameter is included for backwards compatibility. It
          is no longer used at all, and will not be modified with swiftclient
          info, since swiftclient is not used any more.
          """
          return self.create(obj_name=obj_name, data=data,
                  content_type=content_type, etag=etag,
                  content_encoding=content_encoding, ttl=ttl,
                  return_none=return_none, headers=headers)