UPD: dav_events: renamed utils method to roles.

dav_events/views/events.py

@@ -20,7 +20,7 @@ from .. import choices
 from .. import emails
 from .. import forms
 from .. import models
-from ..utils import get_users_by_role, has_role
+from ..roles import get_users_by_role, has_role
 from ..workflow import DefaultWorkflow
 
 logger = logging.getLogger(__name__)