code: def testXceptionLargeImage(self):
      self._test_xception(img_size=256)
  
file_path: tensor2tensor/tensor2tensor/models/xception_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  from tensor2tensor.data_generators import problem_hparams
  from tensor2tensor.layers import modalities
  from tensor2tensor.models import xception
  import tensorflow.compat.v1
  from tensorflow.compat.v1 import estimator
label_desc: Use image node_id 3 for calling the XceptionTest obj's underlying member method code with example usage: obj.testXceptionLargeImage() without return types