code: def get_5d_input(self):
      input_5d = {"image": np.random.randn(*SHAPE_5D)}
      interp_order = {"image": (3,)}
      return input_5d, interp_order
  
file_path: NiftyNet/tests/rand_bias_field_test.py
imports: from __future__ import absolute_import, print_function
  import numpy
  import tensorflow
  from niftynet.layer.rand_bias_field import RandomBiasFieldLayer
  from tests.niftynet_testcase import NiftyNetTestCase
label_desc: Use image node_id 2 for calling the RandDeformationTests obj's underlying member method code with example usage: obj.get_5d_input() and returns: input_5d,  interp_order