code: def transform(self, transform_fn):
      if self.data is not None:
          return self.__class__(transform_fn(self.data))
  
      def loader():
          return transform_fn(self.load())
  
      return self.__class__(loader_fn=loader)
  
imports: from copy import deepcopy
  import aimrocks.lib_rocksdb
label_desc: Use image node_id 6 for calling the BLOB obj's underlying member method code with example usage: obj.transform(transform_fn) and returns: self, self, transform_fn