chain static method
Iterate a list of Futures while passing through results.
await F4.forEach(
[
()=>Future.value(1),
(int r)=>Future.value(r*2)
]);
Implementation
static Future chain(Iterable<Function> fns, {AbortSignal? abortSignal,
bool? cancelOnError}) => Chain(fns, abortSignal: abortSignal,
cancelOnError: cancelOnError).run();