title: Dart analyzer in webstorm shows the message - unused import
body: <p>Please help! Dart analyzer in webstorm shows the message - unused import. I can't understand the reason and fix it. The image contains the file content - app_component.dart</p>
  
  <p>On this line (<em>import 'src/click_me2_component.dart';</em>) in the file lib/app_component.dart I get a message  -  <em>info: Unused import: 'src/click_me2_component.dart'. (unused_import at [angular_app] lib\app_component.dart:1)</em></p>
  
  <p><strong>Image</strong> - 
  <a href="https://i.stack.imgur.com/c0IR0.jpg" rel="nofollow noreferrer">app_component.dart</a></p>
  
  <p><strong>lib/app_component.dart</strong></p>
  
  <pre class="lang-dart prettyprint-override"><code>import 'src/click_me2_component.dart';
  import 'package:angular/angular.dart';
  
  
  @Component(
    selector: 'my-app',
    template: '''&lt;h1&gt;Hello {{name}}&lt;/h1&gt;
    &lt;click-me2&gt;&lt;/click-me2&gt;''',
  )
  class AppComponent {
    var name = 'Angular';
  }
  </code></pre>
  
  <p><strong>lib/src/click_me2_component.dart</strong></p>
  
  <pre class="lang-dart prettyprint-override"><code>import 'package:angular/angular.dart';
  
  @Component(
    selector: 'click-me2',
    template: '''
      &lt;h1&gt;No! .. Click me!&lt;/h1&gt;
    ''',
  )
  class ClickMe2Component {
    String clickMessage = '';
    int _clicks = 1;
  
  }
  </code></pre>
  
  <p><strong>analysis_options.yaml</strong></p>
  
  <p><pre><code>   analyzer:
    exclude: [build/**]
    errors:
      uri_has_not_been_generated: ignore
    plugins:
      - angular</p>
  
  <p>linter:
    rules:
      - cancel_subscriptions
      - hash_and_equals
      - iterable_contains_unrelated_type
      - list_remove_unrelated_type
      - test_types_in_equals
      - unnecessary_const
      - unnecessary_new
      - unrelated_type_equality_checks
      - valid_regexps</p>
  
  <p></code></pre></p>