code: function(params, included) {
      if(!params) return '';
      var url_params = [];
      included = included || _.keys(params);
      for(var i in included) {
        var k = included[i]
        var p = params[k];
        if(p) {
          if (_.isArray(p)) {
            for (var j = 0, len = p.length; j < len; j++) {
              url_params.push(k + "[]=" + encodeURIComponent(p[j]));
            }
          } else {
            var q = encodeURIComponent(p);
            q = q.replace(/%7Bx%7D/g,"{x}").replace(/%7By%7D/g,"{y}").replace(/%7Bz%7D/g,"{z}");
            url_params.push(k + "=" + q);
          }
        }
      }
      return url_params.join('&')
    }
docs: Change query of the tiles
  @params {str} New sql for the tiles