# Source code for sphinxcontrib.bibtex.style.names.last

    from pybtex.style.names import BaseNameStyle, name_part
    from pybtex.style.template import join

    class LastNameStyle(BaseNameStyle):
        """A simple name style for formatting the last name of an author."""

        def format(self, person, abbr=True):
            """Format last names."""

            return join[
                name_part(tie=True)[person.rich_prelast_names],
                name_part[person.rich_last_names],
            ]