Wording in `mypy.plugin.Plugin.get_method[_signature]_hook` docstring

Documentation

The docstring of these plugin hook methods currently say:

https://github.com/python/mypy/blob/057508b4cb405fbc22e26b44f764b142352fcce5/mypy/plugin.py#L647-L648

...

https://github.com/python/mypy/blob/057508b4cb405fbc22e26b44f764b142352fcce5/mypy/plugin.py#L664

I understand this to mean that the argument to fullname will be "__main__.Base.method", because __main__.Base defines method.

However, this doesn't seem to be the case. Setting up the same example in the docstring:

• mypy.ini

  [mypy]
  plugins = plugin.py
  files = test.py
  

• plugin.py

  from mypy.plugin import Plugin
  
  def plugin(version):
      return TestPlugin
  
  class TestPlugin(Plugin):
      def get_method_signature_hook(self, fullname):
          if fullname.startswith("test."):
              print(f"Hook will be called with `{fullname}`")
  

• test.py

  from typing import Any
  
  class Base:
      def method(self, arg: Any) -> Any: ...
  
  class Derived(Base): ...
  
  var: Derived
  var.method(42)
  

$ mypy
Hook will be called with `test.Derived.method`

I installed as far back as mypy 0.9x and it was the same behaviour as described above, displaying test.Derived.method (not test.Base.method).

Is there something wrong with the docstring (perhaps from outdated behaviour that no longer applies), or have I misunderstood something?

まず、mypy/plugin.py の 647-648 行付近と 664 行にあるリンク先の hook docstring を確認し、続いて提示された mypy.ini、plugin.py、test.py の例を再現します。ドキュメントに記載された fullname と、観測された test.Derived.method の値を比較します。docstring が hook の引数を正確に説明するか、報告された誤解を明らかにできれば作業は完了です。