code: def transform(self, data: DataEntry) -> DataEntry:
      return valmap(self.fn, data)
  
imports: from typing import Callable, Iterator, List, Optional, Tuple, Type
  import numpy
  from toolz import valmap
  from gluonts.core.component import validated, tensor_to_numpy
  from gluonts.dataset.common import DataEntry
  from gluonts.exceptions import assert_data_error
  from ._base import FlatMapTransformation, MapTransformation, SimpleTransformation
label_desc: Use image node_id 2 for calling the Valmap obj's underlying member method code with example usage: obj.transform(data) and returns: valmap