code: def transform_dataset(in_data):
      return in_data.map(lambda x: {"id": x["id"] * 2})
  
file_path: ray/python/ray/workflow/tests/test_dataset.py
imports: from ray.tests.conftest import *
  import pytest
  import ray
  from ray import workflow
label_desc: Use image node_id 4 for calling a global function with example usage: transform_dataset(in_data) and returns: in_data