2. mainAsset    Main asset that was supplied when building the asset bundle (Read Only).
    6. Public Functions
    8. Contains    Check if an AssetBundle contains a specific object.
    10. LoadAllAssets    Loads all assets contained in the asset bundle that inherit from type.
    11. LoadAllAssetsAsync    Loads all assets contained in the asset bundle asynchronously.
    12. LoadAsset    Loads asset with name from the bundle.
    13. LoadAssetAsync    Asynchronously loads asset with name from the bundle.
    14. LoadAssetWithSubAssets    Loads asset and sub assets with name from the bundle.
    15. LoadAssetWithSubAssetsAsync    Loads asset with sub assets with name from the bundle asynchronously.
    16. Unload    Unloads all assets in the bundle.
    21. Static Functions
    23. LoadFromFile    Synchronously loads an AssetBundle from a file on disk. 必须有UncompressedAssetBundle
    24. LoadFromFileAsync    Asynchronously loads an AssetBundle from a file on disk.