Can someone explain how to do this?

[abadsvt]

Hi guys! I have always loved how the sway bar is incorporated into the frame instead of just bolting to the frame. I hope that makes sence. Here is a pic of what i am talking about and hopefully someone can explain how it is done. I thought it might be a splined swaybar inside a shaft with some bearings and snap rings so it can't go side to side. Any comments would be much appreciated.

Josh