Dart, how to create a future to return in your own functions?

Question

is it possible to create your own futures in Dart to return from your methods, or must you always return a built in future return from one of the dart async libraries methods?

Answer 1

@Fox32 has the correct answer addition to that we need to mention Type of the Completer otherwise we get exception

Exception received is type 'Future' is not a subtype of type 'FutureOr>

so initialisation of completer would become

var completer= new Completer>();