def make_rev_options(self, rev=None, extra_args=None):
        # type: (Optional[str], Optional[List[str]]) -> RevOptions
        """
        Return a RevOptions object.

        Args:
          rev: the name of a revision to install.
          extra_args: a list of extra options.
        """
        return RevOptions(self, rev, extra_args=extra_args)

        Return a RevOptions object.

        Args:
          rev: the name of a revision to install.
          extra_args: a list of extra options.
        
stackoverflow/venv/lib/python3.6/site-packages/pip-19.0.3-py3.6.egg/pip/_internal/vcs/__init__.py