@cheatsheetSection Dependency injection configuration @cheatsheetIndex 9 @description {@target js ts}`import {provide} from 'angular2/angular2';`{@endtarget} {@target dart}`import 'package:angular2/angular2.dart';`{@endtarget} @cheatsheetItem syntax: `provide(MyService, {useClass: MyMockService})`|`provide`|`useClass` description: Sets or overrides the provider for MyService to the MyMockService class. @cheatsheetItem syntax: `provide(MyService, {useFactory: myFactory})`|`provide`|`useFactory` description: Sets or overrides the provider for MyService to the myFactory factory function. @cheatsheetItem syntax: `provide(MyValue, {useValue: 41})`|`provide`|`useValue` description: Sets or overrides the provider for MyValue to the value 41.