class_docstr: Just passes through given input data without modification
class_docstr_tok: ["Just","passes","through","given","input","data","without","modification"]
code: def optional_prepare_for_fit(
      self, pipeline, data: Union[InputData, MultiModalData]
  ) -> Union[InputData, MultiModalData]:
      BasePreprocessor.mark_as_preprocessed(data, is_obligatory=False)
      return data
  
imports: from typing import TYPE_CHECKING, Union
  import numpy
  from golem.core.log import default_log
  from fedot.core.data.data import InputData, OutputData
  from fedot.core.data.multi_modal import MultiModalData
  from .base_preprocessing import BasePreprocessor
label_desc: Use image node_id 4 for calling the DummyPreprocessor obj's underlying member method code with example usage: obj.optional_prepare_for_fit(pipeline, data) and returns: data