def create(key, value, options = {})
      last = false
      @stack.each {|s| last = s.create(key, value, options) }
      last
    end
def create(key, value, options = {})
      last = false
      @stack.each {|s| last = s.create(key, value, options) }
      last
    end
(see Proxy#create)