illustration of usage of CCC

[MiaoXiYun]

Could you show how to call the CCC toolbox with a simple example of an opportunity constraint problem? for example:
min x1+x2
s.t. Pr{3x1+4x2<=alpha}>=0.8,alpha~exp(2)
x1-x2=1
-3<=x1,x2<=0
Thank you a lot!