code: def close_all(self):
      # do nothing
      pass
  
file_path: NiftyNet/niftynet/contrib/sampler_pairwise/sampler_pairwise_uniform.py
imports: from __future__ import absolute_import, division, print_function
  import numpy
  import tensorflow
  from niftynet.engine.image_window import ImageWindow
  from niftynet.layer.base_layer import Layer
  from niftynet.layer.grid_warper import AffineGridWarperLayer
  from niftynet.layer.resampler import ResamplerLayer
  from niftynet.layer.linear_resize import LinearResizeLayer
label_desc: Use image node_id 6 for calling the PairwiseUniformSampler obj's underlying member method code with example usage: obj.close_all() without return types