Comment 2 for bug 1775934

This is where we will send 'flavor' as one of the attributes to pre-load when querying for instances in all cells:

            # merge our expected attrs with what the view builder needs for
            # showing details
            expected_attrs = self._view_builder.get_show_expected_attrs(
                                                                expected_attrs)

https://github.com/openstack/nova/blob/125dd1f30fdaf50182256c56808a5199856383c7/nova/api/openstack/compute/servers.py#L350