Access to the Work Area properties (Start and End) of a composition with expressions

We can access marker times , keyframes times etc. But we cannot access then work area start and finish times via expressions.

this will be helpful for creating loops and much more i suspect. 

somethingLike = thisComp.workAreaStart;
andThis = thisComp.workAreaEnd;

It can return time values just like inPoint and outPoint does for a layer.

thanks