389     def gql(cls, req, query_string, *args, **kwds):

   389     def gql(cls, req, query_string, *args, **kwds):

   390         raise NotImplementedError('use rql')

   390         raise NotImplementedError('use rql')

   391 

   391 

   392     @classmethod

   392     @classmethod

   393     def kind(cls):

   393     def kind(cls):

   395 

   395 

   396     @classmethod

   396     @classmethod

   397     def properties(cls):

   397     def properties(cls):

   398         raise NotImplementedError('use eschema')

   398         raise NotImplementedError('use eschema')

   399 

   399