code: def set_ipcsem_params(self, ftok=None, persistent=None):
          
          self._set('ftok', ftok)
          self._set('persistent-ipcsem', persistent, cast=bool)
  
          return self._section
docs: Sets ipcsem lock engine params.
  
          :param str|unicode ftok: Set the ipcsem key via ftok() for avoiding duplicates.
  
          :param bool persistent: Do not remove ipcsem's on shutdown.