異なるアセットバンドルやプレイヤーの相互参照・依存関係を管理することができます
If a asset bundle has dependencies to other asset bundles, it is your responsibility to make sure the dependent asset bundles are loaded through the UnityWebRequest class.
When you push asset dependencies it will share all resources on that layer, pushing recursively always inherits the previous dependencies.
PushAssetDependencies and PopAssetDependencies must even each other out.
関連項目: PushAssetDependencies, BuildAssetBundle.