when using "suspend" functions in interfaces (not implementation) for common shared code. How is that "suspend" qualifier translated for iOS code implementing that interface?

Similar to the JVM I'd guess, but I'm not sure it's exported to Obj-C.

iirc, as of 1.4 it's exported with an additional callback parameter

thanks, so prior to 1.4 the "suspend" modifier was like ignored on iOS?

correct

Follow up question, how about using Flow, does that get translated to iOS too?

Prior 1.4 suspend method was completely missing in generated ObjectiveC header file.