/// <summary>
        /// Initializes the Mixed Reality Extension SDK API.
        /// </summary>
        /// <param name="defaultMaterial">The material template used for all SDK-spawned meshes.</param>
        /// <param name="behaviorFactory">The behavior factory to use within the runtime.</param>
        /// <param name="textFactory">The text factory to use within the runtime.</param>
        /// <param name="primitiveFactory">The primitive factory to use within the runtime.</param>
        /// <param name="libraryFactory">The library resource factory to use within the runtime.</param>
        /// <param name="assetCache">The place for this MRE to cache its meshes, etc.</param>
        /// <param name="gltfImporterFactory">The glTF loader factory. Uses default GLTFSceneImporter if omitted.</param>
        /// <param name="materialPatcher">Overrides default material property map (color and mainTexture only).</param>
        /// <param name="userInfoProvider">Provides appId/sessionId scoped IUserInfo instances.</param>
        /// <param name="engineConstants">Engine constants supplied by the host app.</param>
        /// <param name="logger">The logger to be used by the MRE SDK.</param>
        public static void InitializeAPI(
            UnityEngine.Material defaultMaterial,
            IBehaviorFactory behaviorFactory       = null,
            ITextFactory textFactory               = null,
            IPrimitiveFactory primitiveFactory     = null,
            ILibraryResourceFactory libraryFactory = null,
            IAssetCache assetCache = null,
            IGLTFImporterFactory gltfImporterFactory = null,
            IMaterialPatcher materialPatcher         = null,
            IUserInfoProvider userInfoProvider       = null,
            IEngineConstants engineConstants         = null,
            IMRELogger logger = null)
        {
            AppsAPI.DefaultMaterial        = defaultMaterial;
            AppsAPI.BehaviorFactory        = behaviorFactory;
            AppsAPI.TextFactory            = textFactory ?? throw new ArgumentException($"{nameof(textFactory)} cannot be null");
            AppsAPI.PrimitiveFactory       = primitiveFactory ?? new MWPrimitiveFactory();
            AppsAPI.LibraryResourceFactory = libraryFactory;
            AppsAPI.AssetCache             = assetCache ?? new AssetCache();
            AppsAPI.GLTFImporterFactory    = gltfImporterFactory ?? new GLTFImporterFactory();
            AppsAPI.MaterialPatcher        = materialPatcher ?? new DefaultMaterialPatcher();
            AppsAPI.UserInfoProvider       = userInfoProvider ?? new NullUserInfoProvider();
            AppsAPI.EngineConstants        = engineConstants;

#if ANDROID_DEBUG
            Logger = logger ?? new UnityLogger();
#else
            Logger = logger ?? new ConsoleLogger();
#endif
        }
        /// <summary>
        /// Initializes the Mixed Reality Extension SDK API.
        /// </summary>
        /// <param name="defaultMaterial">The material template used for all SDK-spawned meshes.</param>
        /// <param name="layerApplicator">The class used to apply MRE layers to Unity colliders.</param>
        /// <param name="behaviorFactory">The behavior factory to use within the runtime.</param>
        /// <param name="textFactory">The text factory to use within the runtime.</param>
        /// <param name="primitiveFactory">The primitive factory to use within the runtime.</param>
        /// <param name="libraryFactory">The library resource factory to use within the runtime.</param>
        /// <param name="gltfImporterFactory">The glTF loader factory. Uses default GLTFSceneImporter if omitted.</param>
        /// <param name="materialPatcher">Overrides default material property map (color and mainTexture only).</param>
        /// <param name="videoPlayerFactory"></param>
        /// <param name="userInfoProvider">Provides appId/sessionId scoped IUserInfo instances.</param>
        /// <param name="dialogFactory"></param>
        /// <param name="logger">The logger to be used by the MRE SDK.</param>
        public static void InitializeAPI(
            UnityEngine.Material defaultMaterial,
            ILayerApplicator layerApplicator,
            IBehaviorFactory behaviorFactory         = null,
            ITextFactory textFactory                 = null,
            IPrimitiveFactory primitiveFactory       = null,
            ILibraryResourceFactory libraryFactory   = null,
            IGLTFImporterFactory gltfImporterFactory = null,
            IMaterialPatcher materialPatcher         = null,
            IVideoPlayerFactory videoPlayerFactory   = null,
            IUserInfoProvider userInfoProvider       = null,
            IDialogFactory dialogFactory             = null,
            IMRELogger logger = null)
        {
            AppsAPI.DefaultMaterial        = defaultMaterial;
            AppsAPI.LayerApplicator        = layerApplicator;
            AppsAPI.BehaviorFactory        = behaviorFactory;
            AppsAPI.TextFactory            = textFactory ?? throw new ArgumentException($"{nameof(textFactory)} cannot be null");
            AppsAPI.PrimitiveFactory       = primitiveFactory ?? new MWPrimitiveFactory();
            AppsAPI.LibraryResourceFactory = libraryFactory;
            AppsAPI.VideoPlayerFactory     = videoPlayerFactory;
            AppsAPI.GLTFImporterFactory    = gltfImporterFactory ?? new GLTFImporterFactory();
            AppsAPI.MaterialPatcher        = materialPatcher ?? new DefaultMaterialPatcher();
            AppsAPI.UserInfoProvider       = userInfoProvider ?? new NullUserInfoProvider();
            AppsAPI.DialogFactory          = dialogFactory;

#if ANDROID_DEBUG
            Logger = logger ?? new UnityLogger(null);
#else
            Logger = logger ?? new ConsoleLogger(null);
#endif
        }
        /// <summary>
        /// Initializes the Mixed Reality Extension SDK API.
        /// </summary>
        /// <param name="defaultMaterial">The material template used for all SDK-spawned meshes.</param>
        /// <param name="layerApplicator">The class used to apply MRE layers to Unity colliders.</param>
        /// <param name="assetCache">The class responsible for long-term asset caching.</param>
        /// <param name="textFactory">The text factory to use within the runtime.</param>
        /// <param name="permissionManager">The instance responsible for presenting users with permission requests.</param>
        /// <param name="behaviorFactory">The behavior factory to use within the runtime.</param>
        /// <param name="dialogFactory"></param>
        /// <param name="libraryFactory">The library resource factory to use within the runtime.</param>
        /// <param name="videoPlayerFactory"></param>
        /// <param name="primitiveFactory">The primitive factory to use within the runtime.</param>
        /// <param name="gltfImporterFactory">The glTF loader factory. Uses default GLTFSceneImporter if omitted.</param>
        /// <param name="materialPatcher">Overrides default material property map (color and mainTexture only).</param>
        /// <param name="userInfoProvider">Provides appId/sessionId scoped IUserInfo instances.</param>
        /// <param name="logger">The logger to be used by the MRE SDK.</param>
        public static void InitializeAPI(
            // required properties
            SpatialMaterial defaultMaterial,
            ILayerApplicator layerApplicator,
            IAssetCache assetCache,
            ITextFactory textFactory,
            IPermissionManager permissionManager,
            // missing features if omitted
            IBehaviorFactory behaviorFactory = null,
            //IDialogFactory dialogFactory = null,
            ILibraryResourceFactory libraryFactory = null,
            //IVideoPlayerFactory videoPlayerFactory = null,
            // reasonable defaults provided
            IPrimitiveFactory primitiveFactory       = null,
            IGLTFImporterFactory gltfImporterFactory = null,
            IMaterialPatcher materialPatcher         = null,
            IMRELogger logger = null)
        {
            // required properties
            AppsAPI.DefaultMaterial   = defaultMaterial;
            AppsAPI.LayerApplicator   = layerApplicator;
            AppsAPI.AssetCache        = assetCache;
            AppsAPI.TextFactory       = textFactory;
            AppsAPI.PermissionManager = permissionManager;

            // missing features if omitted
            AppsAPI.BehaviorFactory = behaviorFactory;
            //AppsAPI.DialogFactory = dialogFactory;
            AppsAPI.LibraryResourceFactory = libraryFactory;
            //AppsAPI.VideoPlayerFactory = videoPlayerFactory;

            // reasonable defaults provided
            AppsAPI.PrimitiveFactory    = primitiveFactory ?? new MWPrimitiveFactory();
            AppsAPI.GLTFImporterFactory = gltfImporterFactory ?? new GLTFImporterFactory();
            AppsAPI.MaterialPatcher     = materialPatcher ?? new DefaultMaterialPatcher();

#if ANDROID_DEBUG
            Logger = logger ?? new UnityLogger(null);
#else
            Logger = logger ?? new ConsoleLogger(null);
#endif
        }