def package_repositories(self):
        """
        Property for accessing :class:`PackageRepositoryManager` instance, which is used to manage package repos.

        :rtype: yagocd.resources.package_repository.PackageRepositoryManager
        """
        if self._package_repository_manager is None:
            self._package_repository_manager = PackageRepositoryManager(session=self._session)
        return self._package_repository_manager
Property for accessing :class:`PackageRepositoryManager` instance, which is used to manage package repos.

        :rtype: yagocd.resources.package_repository.PackageRepositoryManager