map static method
Conccurently generate & iterate futures (output list is ordered).
await F4.map([1,2,3], (int i)=>Future.value(i), concurrency:2);
Implementation
static Future map(Iterable<Object> args, Function f, {AbortSignal? abortSignal,
int? concurrency, bool? cancelOnError}) =>
$Map(args, f, abortSignal: abortSignal, concurrency: concurrency,
cancelOnError:cancelOnError).run();