code: def get_train_val_data():
      data = get_linear_data(size=1000)
      validation_data = get_linear_data(size=400)
      return data, validation_data
  
file_path: BigDL/python/orca/test/bigdl/orca/automl/model/test_base_keras_model.py
imports: from unittest import TestCase
  from bigdl.orca.automl.model.base_keras_model import KerasBaseModel, KerasModelBuilder
  import numpy
  import tensorflow
  import pytest
label_desc: Use image node_id 3 for calling a global function with example usage: get_train_val_data() and returns: data,  validation_data