OneShotClipTrait
constOneShotClipTrait:Trait<{end:number;fadeSeconds:number;hold:boolean;name:string;plays:number;speed:number;start:number; }>
The one-shot clip playClip last asked an entity’s whole body to play,
which every page’s view plays over whatever loops. A room streams it to
every page, as Unreal replicates a montage in RepAnimMontageInfo.