complete method Null safety

void complete(
  1. [FutureOr<T>? value]
)

Completes future with the supplied values.

The value must be either a value of type T or a future of type Future<T>. If the value is omitted or null, and T is not nullable, the call to complete throws.

If the value is itself a future, the completer will wait for that future to complete, and complete with the same result, whether it is a success or an error.

Calling complete or completeError must be done at most once.

All listeners on the future are informed about the value.

Implementation

void complete([FutureOr<T>? value]);