...
from drf_problems.mixins import AllowPermissionWithExceptionViewMixin
from drf_problems.permissions import MinimumVersionRequiredPermission

class UserDetailView(AllowPermissionWithExceptionViewMixin, generics.RetrieveAPIView):
    permission_classes = (
        MinimumVersionRequiredPermission('0.8.9'),
    )
    ...
	...
	from drf_problems.mixins import AllowPermissionWithExceptionViewMixin
	from drf_problems.permissions import MinimumVersionRequiredPermission

	class UserDetailView(AllowPermissionWithExceptionViewMixin, generics.RetrieveAPIView):
	permission_classes = (
	MinimumVersionRequiredPermission('0.8.9'),
	)
	...