ANY NONE
class interface WHEN_WHEEL_DOWN

feature(s) from HASHABLE
   hash_code: INTEGER
      -- The hash-code value of Current.
      ensure
         good_hash_value: Result >= 0

feature(s) from WHEN_WHEEL_DOWN
   when_wheel_down (p: PROCEDURE[ANY,TUPLE])

   when_wheel_down_signal: SIGNAL_0



end of WHEN_WHEEL_DOWN