code: def _func_with_ensure_frozen(a, b):
      return ensure_frozen(a + b)
  
file_path: nni/test/ut/sdk/mutable/test_frozen.py
imports: import pytest
  from nni.mutable import *
label_desc: Use image node_id 6 for calling a global function with example usage: _func_with_ensure_frozen(a, b) and returns: ensure_frozen