class_docstr: Applies the SignalFillEmptyd transform on the input. All NaN values will be replaced with the
  replacement value.
  
  Args:
      keys: keys of the corresponding items to model output.
      allow_missing_keys: don't raise exception if key is missing.
      replacement: The value that the NaN entries shall be mapped to.
code: def __call__(
      self, data: Mapping[Hashable, NdarrayOrTensor]
  ) -> Mapping[Hashable, NdarrayOrTensor]:
      for key in self.key_iterator(data):
          data[key] = self.signal_fill_empty(data[key])  # type: ignore
  
      return data
  
file_path: MONAI/monai/transforms/signal/dictionary.py
imports: from __future__ import annotations
  from collections.abc import Hashable, Mapping
  from monai.config.type_definitions import KeysCollection, NdarrayOrTensor
  from monai.transforms.signal.array import SignalFillEmpty
  from monai.transforms.transform import MapTransform
label_desc: Use image node_id 2 for calling the SignalFillEmptyd obj's underlying member method code with example usage: obj.__call__(data) and returns: data