code: def fake_movielens_df():
      return MockMovielensSchema.get_df(size=DATA_SIZE)
  
imports: import pytest
  from unittest.mock import Mock
  from recommenders.tuning.nni.ncf_utils import compute_test_results
  from recommenders.datasets.movielens import MockMovielensSchema
label_desc: Use image node_id 2 for calling a global function with example usage: fake_movielens_df() and returns: MockMovielensSchema