The global runtime content files register their factories in, by
composition id: window.PixiAnimateRuntimeContents[id] = factory. It is not
under the player's namespace, so that a runtime content file can be loaded
before the player, and the same file serves every player package.
The global runtime content files register their factories in, by composition id:
window.PixiAnimateRuntimeContents[id] = factory. It is not under the player's namespace, so that a runtime content file can be loaded before the player, and the same file serves every player package.