ControlButtonsContainer An interface that defines a container which holds a certain number of slots to show control buttons. 


CastSeekBar A custom seek bar provided by the Cast SDK mimicking the Android SeekBar
ExpandedControllerActivity This abstract class provides most of the implementation of an expanded controller, which is an out-of-the-box remote player, used when casting media to a cast device. 
MiniControllerFragment A fragment that provides remote control functionality.