@cheatsheetSection Dependency injection configuration @cheatsheetIndex 7 @description `import {provide} from 'angular2/angular2';` @cheatsheetItem `provide(MyService, {useClass: MyMockService})``provide`|`useClass` Sets or overrides the provider for MyService to the MyMockService class. @cheatsheetItem `provide(MyService, {useFactory: myFactory})``provide`|`useFactory` Sets or overrides the provider for MyService to the myFactory factory function. @cheatsheetItem `provide(MyValue, {useValue: 41})``provide`|`useValue` Sets or overrides the provider for MyValue to the value 41.