class_docstr: ```
  predicts image classes
  ```
class_docstr_tok: ["``","`","predicts","image","classes","``","`"]
code: def _save_preproc(self, fpath):
      preproc_name = "tf_model.preproc"
      with open(os.path.join(fpath, preproc_name), "wb") as f:
          datagen = self.preproc.get_preprocessor()
          pfunc = datagen.preprocessing_function
          datagen.preprocessing_function = None
          pickle.dump(self.preproc, f)
          datagen.preprocessing_function = pfunc
      return
  
file_path: ktrain/ktrain/vision/predictor.py
imports: from ..None import utils
  from ..imports import *
  from ..predictor import Predictor
  from .preprocessor import ImagePreprocessor
label_desc: Use image node_id 13 for calling the ImagePredictor obj's underlying member method code with example usage: obj._save_preproc(fpath) without return types