340     on(type: 'cameraStatus', callback: AsyncCallback<CameraStatusInfo>): void;  method
350     on(type: 'cameraMute', callback: AsyncCallback<boolean>): void;  method
595     on(type: 'error', camera: CameraDevice, callback: ErrorCallback<BusinessError>): void;  method
1133     on(type: 'focusStateChange', callback: AsyncCallback<FocusState>): void;  method
1142     on(type: 'error', callback: ErrorCallback<BusinessError>): void;  method
1217     on(type: 'frameStart', callback: AsyncCallback<void>): void;  method
1226     on(type: 'frameEnd', callback: AsyncCallback<void>): void;  method
1235     on(type: 'error', callback: ErrorCallback<BusinessError>): void;  method
1420     on(type: 'captureStart', callback: AsyncCallback<number>): void;  method
1429     on(type: 'frameShutter', callback: AsyncCallback<FrameShutterInfo>): void;  method
1438     on(type: 'captureEnd', callback: AsyncCallback<CaptureEndInfo>): void;  method
1447     on(type: 'error', callback: ErrorCallback<BusinessError>): void;  method
1539     on(type: 'frameStart', callback: AsyncCallback<void>): void;  method
1548     on(type: 'frameEnd', callback: AsyncCallback<void>): void;  method
1557     on(type: 'error', callback: ErrorCallback<BusinessError>): void;  method
1678     on(type: 'metadataObjectsAvailable', callback: AsyncCallback<Array<MetadataObject>>): void;  method
1687     on(type: 'error', callback: ErrorCallback<BusinessError>): void;  method