code: def fit(self, X, Y=None):
      self.preprocessor = "passthrough"
      self.fitted_ = True
      return self
  
file_path: auto-sklearn/autosklearn/pipeline/components/feature_preprocessing/no_preprocessing.py
imports: from typing import Optional
  from ConfigSpace.configuration_space import ConfigurationSpace
  from autosklearn.askl_typing import FEAT_TYPE_TYPE
  from autosklearn.pipeline.components.base import AutoSklearnPreprocessingAlgorithm
  from autosklearn.pipeline.constants import DENSE, INPUT, SPARSE, UNSIGNED_DATA
label_desc: Use image node_id 2 for calling the NoPreprocessing obj's underlying member method code with example usage: obj.fit(X, Y) and returns: self