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