docs: def with_matching_args(self, *args, **kwargs):
          """Set the last call to expect specific argument values if those arguments exist.
  
          Unlike :func:`fudge.Fake.with_args` use this if you want to only declare
          expectations about matching arguments.  Any unknown keyword arguments
          used by the app under test will be allowed.
  
          For example, you can declare positional arguments but ignore keyword arguments:
  
          .. doctest::
  
              >>> import fudge
              >>> db = fudge.Fake('db').expects('transaction').with_matching_args('insert')
  
          With this declaration, any keyword argument is allowed:
  
          .. doctest::
  
              >>> db.transaction('insert', isolation_level='lock')
              >>> db.transaction('insert', isolation_level='shared')
              >>> db.transaction('insert', retry_on_error=True)
  
          .. doctest::
              :hide:
  
              >>> fudge.clear_expectations()
  
          .. note::
  
              you may get more mileage out of :mod:`fudge.inspector` functions as
              described in :func:`fudge.Fake.with_args`
  
          """
          exp = self._get_current_call()
          if args:
              exp.expected_matching_args = args
          if kwargs:
              exp.expected_matching_kwargs = kwargs
          return self