code: function() {
  
                      if(nativeMousedown && !customShowHideEvent) {
  
                          self._update($(this));
  
                          self.triggerEvent("option-mouseup");
  
                          // If the current drop down option is not disabled
                          if ($(this).attr("data-disabled") === "false" && $(this).attr("data-preventclose") !== "true") {
  
                              // Closes the drop down list
                              self.close();
  
                          }
  
                      }
  
                  }
docs: Delegates the `focus` event with the `selectBoxIt` namespace to the list items