# File lib/tapkit/control/keyvaluecoding.rb, line 155
                def retrieve_stored_value( key )
                        unless property_keys.include?(key) then
                                begin
                                        object = handle_retrieve_value key
                                rescue UnknownKeyError
                                        _raise_error(self, key)
                                end
                        end
                        _retrieve_stored_value( key )
                end