def transform_values!(&b)
            self.each_pair do |k, v|
                self[k] = b.call(unlink_object(v))
            end
        end
def transform_values!(&b)
            self.each_pair do |k, v|
                self[k] = b.call(unlink_object(v))
            end
        end
Modifies the values of the Dictionary, leaving keys unchanged.