code: def test_func_building():
      dag = func.bind()
      assert len(pipeline_build(dag)) == 1
  
file_path: ray/python/ray/serve/tests/test_deployment_graph_handle_serde.py
imports: import sys
  import pytest
  import ray
  from ray import serve
  from ray.serve._private.deployment_graph_build import build
  from ray.serve.dag import InputNode
label_desc: Use image node_id 3 for calling a global function with example usage: test_func_building() without return types