code: def __call__(self, inputs):
      pos = tf_euler.sample_neighbor(
          inputs, self.edge_type, self.num_pos, self.max_id + 1
      )[0]
      return pos
  
file_path: euler/tf_euler/python/solution/samplers.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow
  import tf_euler
label_desc: Use image node_id 2 for calling the SamplePosWithTypes obj's underlying member method code with example usage: obj.__call__(inputs) and returns: pos