code: def _create_source_map(self, test_fn):
      node, source = parser.parse_entity(test_fn, ())
      origin_info.resolve_entity(node, source, test_fn)
      # Creating a source map with the source code as output will create
      # an identity map.
      return origin_info.create_source_map(
          node, source, "test_filename"
      )
  
imports: import inspect
  import sys
  import textwrap
  import unittest
  from nvidia.dali._autograph.pyct import anno
  from nvidia.dali._autograph.pyct import inspect_utils
  from nvidia.dali._autograph.pyct import origin_info
  from nvidia.dali._autograph.pyct import parser
  from nvidia.dali._autograph.pyct.testing import basic_definitions
label_desc: Use image node_id 2 for calling the OriginInfoTest obj's underlying member method code with example usage: obj._create_source_map(test_fn) and returns: origin_info