376     """accept if parameters specified as initializer arguments are specified

   376     """accept if the relation type is in one of the sets given as initializer

   377     in named arguments given to the selector

   377     argument. The goal of this selector is that it keeps reference to original sets,

   378     so modification to thoses sets are considered by the selector. For instance

   379 

   380     MYSET = set()

   381 

   382     class Hook1(Hook):

   383         __regid__ = 'hook1'

   384         __select__ = Hook.__select__ & match_rtype_sets(MYSET)

   385         ...

   386 

   387     class Hook2(Hook):

   388         __regid__ = 'hook2'

   389         __select__ = Hook.__select__ & match_rtype_sets(MYSET)

   390 

   391     Client code can now change `MYSET`, this will changes the selection criteria

   392     of :class:`Hook1` and :class:`Hook1`.