code: def get_x_y(size):
      x = np.random.rand(size)
      y = x / 2
  
      x = x.reshape((-1, 1))
      y = y.reshape((-1, 1))
      return x, y
  
imports: import tensorflow
  import numpy
  from unittest import TestCase
  from bigdl.orca.automl.auto_estimator import AutoEstimator
  import pytest
label_desc: Use image node_id 5 for calling a global function with example usage: get_x_y(size) and returns: x,  y