| Default | Annotates a default provider. | 
| MainThread | Annotates an Executor that executes tasks on the main thread | 
| ActiveRootLister | Provides access to all root views in an application. | 
| BaseLayerModule | Dagger module for creating the implementation classes within the base package. | 
| BaseLayerModule.FailureHandlerHolder | Holder for AtomicReference | 
| DefaultFailureHandler | Espresso's default FailureHandler. | 
| IdlingResourceRegistry | Keeps track of user-registered IdlingResources. | 
| RootViewPicker | Provides the root View of the top-most Window, with which the user can interact. | 
| UiControllerModule | Dagger module for UiController. | 
| ViewFinderImpl | Implementation of ViewFinder. |