code: def test_work_wires_None():
      """Test that work wires of None are not inpreted as work wires."""
      op = qml.GroverOperator(wires=(0, 1, 2, 3), work_wires=None)
      assert op.hyperparameters["work_wires"] == qml.wires.Wires([])
  
file_path: pennylane/tests/templates/test_subroutines/test_grover.py
imports: import functools
  import itertools
  import pytest
  import numpy
  import pennylane
  from pennylane.ops import Hadamard, PauliZ, MultiControlledX
label_desc: Use image node_id 4 for calling a global function with example usage: test_work_wires_None() without return types