ruby on rails - Using country-select with formastic -

I am trying to select the country, such as with the format:

 < Code>: country_of_residence, as in: => : Country   
 The problem is that I do not want to put New Zealand in other countries on top. 
    
 
 
 try it  
  & lt ;% = F.input: nationality, in the form of: & gt; : Country ,: priority_countries = & gt; ["New Zealand"]% & gt;