Abstract classes and interfaces

ClutterActor — Base abstract class for all visual stage actors.
ClutterContainer — An interface for implementing container actors
ClutterChildMeta — Wrapper for actors inside a container
ClutterMedia — An interface for controlling playback of media data
ClutterLayoutManager — Layout managers base class
ClutterLayoutMeta — Wrapper for actors inside a layout manager
ClutterActorMeta — Base class of actor modifiers
ClutterAction — Abstract class for event-related logic
ClutterConstraint — Abstract class for constraints on position or size
ClutterEffect — Base class for actor effects