def elems = _1.split()[4..-2]
def result = ""
for (int i = 0; i<elems.size(); i+=2) {
  result +="\n"
  result +="func With" + elems[i].capitalize() + "("+elems[i] + " " + elems[i+1] + ") Option {\n"
  result +="    return func(opts *options) {\n"
  result +="        opts."+elems[i]+" = " + elems[i] + "\n"
  result +="    }\n}"
}
return result