465         if write:

   465         if write:

   466             return not rtype in NONSYSTEM_RELATIONS

   466             return not rtype in NONSYSTEM_RELATIONS

   467         # due to current multi-sources implementation, the system source

   467         # due to current multi-sources implementation, the system source

   468         # can't claim not supporting a relation

   468         # can't claim not supporting a relation

   469         return True #not rtype == 'content_for'

   469         return True #not rtype == 'content_for'

   473 

   470 

   474     def authenticate(self, session, login, **kwargs):

   471     def authenticate(self, session, login, **kwargs):

   475         """return CWUser eid for the given login and other authentication

   472         """return CWUser eid for the given login and other authentication

   476         information found in kwargs, else raise `AuthenticationError`

   473         information found in kwargs, else raise `AuthenticationError`

   477         """

   474         """