class_docstr: Decoder created by `tfds.decoder.make_decoder` decorator.
code: def dtype(self):
      if self._output_dtype is None:
          return super(DecoderFn, self).dtype
      else:
          return self._output_dtype
  
imports: import abc
  import functools
  from tensorflow_datasets.core.utils import tree_utils
  from tensorflow_datasets.core.utils.lazy_imports_utils import tensorflow
label_desc: Use image node_id 2 for calling the DecoderFn obj's underlying member method code with example usage: obj.dtype() and returns: super, self