code: def test_signature(doc):
      assert (
          doc(m.create_rec_nested)
          == "create_rec_nested(arg0: int) -> numpy.ndarray[NestedStruct]"
      )
  
imports: import re
  import pytest
  import env
  from pybind11_tests import numpy_dtypes
label_desc: Use image node_id 18 for calling a global function with example usage: test_signature(doc) without return types