question: public static HTTPResponse head ( URL url , String username , String password , long timeout , boolean redirect , String charset , String useragent , ProxyData proxy , lucee . commons . net . http . Header [ ] headers ) throws IOException { HttpHead head = new HttpHead ( url . toExternalForm ( ) ) ; return _invoke ( url , head , username , password , timeout , redirect , charset , useragent , proxy , headers , null ) ; }
target:  does a http head request