Problems with "empty" method in select

[oleksiakszymon]

Hello,
I'm not sure how method "empty" in select field is supposed to work. When i'm passing two arguments which is $name, $key - option $name is displayed with given key, but when i'm trying to pass only one argument - $name, option is not rendering. My target is to display option which when selected will not send the parameter at all to GET request.
Any ideas how to do it? Thanks in advance