code: function() {
              var that = this;
              $.each(this.map, function(k, v) {
                 var $c = that.$widget.find('.'+k), f, items;
                 if($c.length) {
                     that['$'+k] = $c; //set properties like this.$day, this.$month etc.
                     f = 'fill' + k.charAt(0).toUpperCase() + k.slice(1); //define method name to fill items, e.g `fillDays`
                     items = that[f](); 
                     that['$'+k].html(that.renderItems(items));
                 }
              }); 
          }
docs: /*
  Initialize combos that presents in template