Can't set 'always-send' property on cookie persistence profile

I'm trying to reproduce a configuration dumped thorugh tmsh using the iControl interface for the LTM. Here's the configuration I'm trying to create: ltm persistence cookie dev-shib-cookie-persistence { always-send enabled app-service none defaults-from /Common/cookie expiration 0 method insert override-connection-limit disabled } Here's what I'm able to create using the iControl API: ltm persistence cookie shib-dev-cookie-persistence { app-service none defaults-from /Common/cookie method insert } Here's my code: lb.ProfilePersistence.create([clean_persistence_name], ['PERSISTENCE_MODE_COOKIE']) lb.ProfilePersistence.set_default_profile([clean_persistence_name], ['/Common/cookie']) lb.ProfilePersistence.set_cookie_persistence_method([clean_persistence_name],[{'value':'COOKIE_PERSISTENCE_METHOD_INSERT', 'default_flag': False}]) I can't find anything on how to configure 'always-send' in the documentation at: https://devcentral.f5.com/wiki/iControl.LocalLB__ProfilePersisten ce.ashx Can you tell me how to set this parameter using the iControl API? I'm using the python bigsuds library if that matters. Thanks!