code: def test_ill_arg(self):
      with self.assertRaises(ValueError):
          LocalNetFeatureExtractorBlock(
              spatial_dims=2,
              in_channels=2,
              out_channels=2,
              initializer="none",
          )
  
file_path: MONAI/tests/test_localnet_block.py
imports: from __future__ import annotations
  import unittest
  import torch
  from parameterized import parameterized
  from monai.networks import eval_mode
  from monai.networks.blocks.localnet_block import LocalNetDownSampleBlock, LocalNetFeatureExtractorBlock, LocalNetUpSampleBlock
label_desc: Use image node_id 2 for calling the TestExtractBlock obj's underlying member method code with example usage: obj.test_ill_arg() without return types