def virtual_storage_resources(self):
        """
        :class:`~zhmcclient.VirtualStorageResourceManager`: Access to the
        :term:`virtual storage resources <Virtual Storage Resource>` in this
        storage group.
        """
        # We do here some lazy loading.
        if not self._virtual_storage_resources:
            self._virtual_storage_resources = \
                VirtualStorageResourceManager(self)
        return self._virtual_storage_resources
:class:`~zhmcclient.VirtualStorageResourceManager`: Access to the
        :term:`virtual storage resources <Virtual Storage Resource>` in this
        storage group.