code: def validate_node(cls, node):
      extra_fields = node.extra_fields
      if isinstance(
          extra_fields, (_ExtraFields_PyCall, _ExtraFields_PyCCall)
      ):
          # Check that the lineage established by the profiler matches the
          # caller recorded by the Python tracer.
          parent = node.parent
          while parent is not None:
              if isinstance(parent.extra_fields, _ExtraFields_PyCall):
                  break
              parent = parent.parent
  
          def to_string(frame_state):
              return f"{frame_state.file_name}(...): {frame_state.function_name}"
  
          if parent:
              parent_name = to_string(parent.extra_fields.callsite)
              caller_name = to_string(extra_fields.caller)
              assert (
                  parent_name == caller_name
              ), f"{parent_name} vs. {caller_name}"
  
imports: import functools
  import os
  import re
  import textwrap
  import traceback
  import unittest
  import expecttest
  import torch
  from torch._C._profiler import _ExtraFields_PyCall, _ExtraFields_PyCCall
  from torch.testing._internal.common_utils import TestCase, run_tests, IS_WINDOWS, TEST_WITH_CROSSREF, IS_ARM64, skipIfTorchDynamo
  from torch.utils._pytree import tree_map
label_desc: Use image node_id 4 for calling the ProfilerTree obj's underlying member method code with example usage: obj.validate_node(cls, node) and returns: frame_state, str, frame_state