class_docstr: echo transformer
class_docstr_tok: ["echo","transformer"]
code: def save(self, file_path, replace=False):
      data_to_save = {
          "feature_cols": self.feature_cols,
          "target_col": self.target_col,
      }
      save_config(file_path, data_to_save, replace=replace)
  
file_path: BigDL/python/chronos/src/bigdl/chronos/autots/deprecated/feature/identity_transformer.py
imports: from bigdl.chronos.autots.deprecated.feature.utils import save_config
  from bigdl.chronos.autots.deprecated.feature.abstract import BaseFeatureTransformer
label_desc: Use image node_id 4 for calling the IdentityTransformer obj's underlying member method code with example usage: obj.save(file_path, replace) without return types