UpperBodyClipTrait
constUpperBodyClipTrait:Trait<{end:number;fadeSeconds:number;hold:boolean;name:string;plays:number;speed:number;start:number; }>
The one-shot clip playClip last asked to play on an entity’s
ClipLayer.UpperBody: the bones from its spine up, over whatever its
legs play. A room streams it to every page, as OneShotClipTrait.