This mixin might be implemented by a component in order to provide cease
facilities. Cease is the zombie between stop and destroy. A processed
sequence may be ceased instead of being stopped. Taken an animation; an
animation sequence is stopped so it stands still ("freezes") to be resumed
again (e.g. via a "start()" method). It may also get ceased instead of being
stopped, in that case it may get faded out or (if it is a sprite) it may
explode - so to gracefully finish off that animation sequence.