def timed_place(name, keys = {})
      place = create_or_find_place(name, keys, TimedPlace)
      @timed_places[place] = true
      place
    end
def timed_place(name, keys = {})
      place = create_or_find_place(name, keys, TimedPlace)
      @timed_places[place] = true
      place
    end
Create and return a new timed place for this model.

 If a place with this
 name exists somewhere in the model (e.g. on other pages), and object
 representing exisiting place will be returned. Keys of both keys will
 be merged. For description of keys see doc for HashMarking.