firstOf
Executes the given suspend producers in parallel and returns the first successfully produced value.
This is a non-nullable variant of firstOfOrNull. If no producer yields a value, it throws an IllegalStateException.
Return
the first successfully produced value
Parameters
T
the type of the produced value
deferreds
suspend producers that are started in parallel
Throws
if none of the producers yielded a value
if the coroutine scope is cancelled or any producer throws it