unnecessary_unawaited

Unnecessary use of 'unawaited'.

The analyzer produces this diagnostic when unawaited is used to mark a call to a function, method, or operator, or a reference to a field, getter, or top-level variable as safely not being awaited, but the called member is also annotated with @awaitNotRequired. This annotation itself signals that wrapping with unawaited is unnecessary at any call site.

The following code produces this diagnostic because unawaited is invoked on a call to a function that's annotated with @awaitNotRequired:

import 'dart:async';
import 'package:meta/meta.dart';
​
@awaitNotRequired
Future<bool> log(String message) async => true;
​
void f() {
  unawaited(log('Message.'));
}

Remove the invocation of unawaited:

import 'package:meta/meta.dart';
​
@awaitNotRequired
Future<bool> log(String message) async => true;
​
void f() {
  log('Message.');
}