Every fiber-blocking operation eventually ends up with a call to Fiber.park(). If you want to call park in your function or call a function that calls park etc., you need to let Quasar know that your function is "suspendable". There are several ways to do that: you can declare to throw a SuspendExecution exception, you can annotate your method with a @Suspendable annotation, or you could declare it as suspendable programmatically or in an external text file.
Correct, but we'll provide implementations for the most popular IO APIs (NIO, REST services, web sockets, JDBC etc.) so it is a limitation, but I think it's a small one.
Once the documentation is complete you'll know how to transform any callback-based asynchronous call into a fiber-blocking one, so you could integrate your own libraries with Quasar. It's very-very simple.
