> And how can I call their library inside the runtime.js inside the c2runtime folder?
I don't understand why you're asking - it's all still JavaScript. So, the same way you already are.
Sorry, english is not my mother language and sometimes I can make some mistakes.
I meant if there is a way to call their script as a dependency the way it is possible in the C3 (sure it is not the same instructions, but how?).