fixedCombinations1 = 
  let Just url = importURL "http://c.c/page?a=1&a=2" in
 [ [("a","1")]
 , [("a", "2")]
 ] @=? (map url_params $ fixedCombinations "a" 1 url)
fixedCombinations1 = 
  let Just url = importURL "http://c.c/page?a=1&a=2" in
 [ [("a","1")]
 , [("a", "2")]
 ] @=? (map url_params $ fixedCombinations "a" 1 url)
fixedCombinations1 = 
  let Just url = importURL "http://c.c/page?a=1&a=2" in
 [ [("a","1")]
 , [("a", "2")]
 ] @=? (map url_params $ fixedCombinations "a" 1 url)