Flexi Choke is what? in Adobe Illustrator???

I'm not really a design guy but I'm trying. Does anyone know if Adobe Illustrator has a similar function to the Flexi Choke function? I was told to use the Trap function in AI but I'm not certain that is the same as Choke in Flexi. Is there a Flexi/AI guru that would kindly point me in the right direction.

Thanks!