code: def tearDown(self) -> None:
      keras.backend.clear_session()
  
imports: import os
  import unittest
  import numpy
  from calamari_ocr.ocr import SavedCalamariModel
  from calamari_ocr.ocr.predict.params import PredictionResult, Predictions
  from tensorflow import keras
  from calamari_ocr.ocr.dataset.datareader.abbyy.reader import Abbyy
  from calamari_ocr.ocr.dataset.datareader.base import CalamariDataGeneratorParams
  from calamari_ocr.ocr.dataset.datareader.extended_prediction import ExtendedPredictionDataParams
  from calamari_ocr.ocr.dataset.datareader.file import FileDataParams
  from calamari_ocr.ocr.dataset.datareader.hdf5.reader import Hdf5
  from calamari_ocr.ocr.dataset.datareader.pagexml.reader import PageXML
  from calamari_ocr.ocr.predict.predictor import Predictor, PredictorParams, MultiPredictor
  from calamari_ocr.scripts.compute_average_prediction_confidence import run
  from calamari_ocr.scripts.predict import run, PredictArgs
  from calamari_ocr.utils import glob_all
  from calamari_ocr.utils.image import ImageLoaderParams
label_desc: Use image node_id 1 for calling the TestPrediction obj's underlying member method code with example usage: obj.tearDown() without return types