code: def inflight_diagnostic(
      self, rule: Optional[infra.Rule] = None
  ) -> _Diagnostic:
      if rule is None:
          # TODO(bowbao): Create builtin-rules and create diagnostic using that.
          if len(self._inflight_diagnostics) <= 0:
              raise AssertionError("No inflight diagnostics")
  
          return self._inflight_diagnostics[-1]
      else:
          for diagnostic in reversed(self._inflight_diagnostics):
              if diagnostic.rule == rule:
                  return diagnostic
          raise AssertionError(
              f"No inflight diagnostic for rule {rule.name}"
          )
  
imports: from __future__ import annotations
  import contextlib
  import dataclasses
  import gzip
  import logging
  from typing import Callable, Generator, Generic, List, Literal, Mapping, Optional, Type, TypeVar
  from torch.onnx._internal.diagnostics import infra
  from torch.onnx._internal.diagnostics.infra import formatter, sarif, utils
  from torch.onnx._internal.diagnostics.infra.sarif import version
label_desc: Use image node_id 12 for calling the DiagnosticContext obj's underlying member method code with example usage: obj.inflight_diagnostic(rule) and returns: self, diagnostic