code: def _get_pass_through_config(self):
      return {
          "name": "identity",
          "num_classes": 3,
          "unique_id": "cortex_pass_through_head",
          "fork_block": "block3",
          "in_plane": 4,
      }
  
file_path: ClassyVision/test/classy_vision_head_test.py
imports: import unittest
  import torch
  from classy_vision.heads import build_head, ClassyHead, register_head
label_desc: Use image node_id 4 for calling the TestClassyHead obj's underlying member method code with example usage: obj._get_pass_through_config() and returns: dict