Determine if the repository contains any packages.

        Returns:
            True if there are no packages, False if there are at least one.

def is_empty(self):
        """Determine if the repository contains any packages.

        Returns:
            True if there are no packages, False if there are at least one.
        """
        for family in self.iter_package_families():
            for pkg in self.iter_packages(family):
                return False

        return True