code: def pytest_generate_tests(metafunc):
      if "poolargs" in metafunc.fixturenames:
          fargs = []
  
          op_list = ["avg", "max"]
          fargs = itt.product(op_list)
          metafunc.parametrize("poolargs", fargs)
  
file_path: neon/tests/test_backend_pool_layer.py
imports: import itertools
  import numpy
  import pytest
  from neon import logger
  from utils import allclose_with_out
label_desc: Use image node_id 5 for calling a global function with example usage: pytest_generate_tests(metafunc) without return types