Interface WebGLSystems

interface WebGLSystems {
    accessibility: AccessibilitySystem;
    backBuffer: GlBackBufferSystem;
    background: BackgroundSystem;
    buffer: GlBufferSystem;
    canvasText: CanvasTextSystem;
    colorMask: GlColorMaskSystem;
    context: GlContextSystem;
    encoder: GlEncoderSystem;
    events: EventSystem;
    extract: ExtractSystem;
    filter: FilterSystem;
    geometry: GlGeometrySystem;
    globalUniforms: GlobalUniformSystem;
    graphicsContext: GraphicsContextSystem;
    hello: HelloSystem;
    htmlText: HTMLTextSystem;
    initHook: RendererInitHook;
    limits: GlLimitsSystem;
    prepare: PrepareBase;
    renderableGC: RenderableGCSystem;
    renderGroup: RenderGroupSystem;
    renderTarget: GlRenderTargetSystem;
    scheduler: SchedulerSystem;
    shader: GlShaderSystem;
    state: GlStateSystem;
    stencil: GlStencilSystem;
    texture: GlTextureSystem;
    textureGC: TextureGCSystem;
    textureGenerator: GenerateTextureSystem;
    ubo: GlUboSystem;
    uniformGroup: GlUniformGroupSystem;
    view: ViewSystem;
}