Macro Rendering Error

File: routine/transistor/transistor-test.md

UndefinedError: 'headers' is undefined

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.14.6/x64/lib/python3.14/site-packages/mkdocs_macros/plugin.py", line 703, in render
    return md_template.render(**page_variables)
           ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.14.6/x64/lib/python3.14/site-packages/jinja2/environment.py", line 1295, in render
    self.environment.handle_exception()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/opt/hostedtoolcache/Python/3.14.6/x64/lib/python3.14/site-packages/jinja2/environment.py", line 942, in handle_exception
    raise rewrite_traceback_stack(source=source)
  File "<template>", line 5, in top-level template code
  File "/opt/hostedtoolcache/Python/3.14.6/x64/lib/python3.14/site-packages/jinja2/environment.py", line 490, in getattr
    return getattr(obj, attribute)
jinja2.exceptions.UndefinedError: 'headers' is undefined