How to use the @here/harp-mapview-decoder/index-worker.GeoJsonTiler function in @here/harp-mapview-decoder

lookAt.tilt,
            lookAt.azimuth
        );
        // Shutdown errors cause by firefox bug
        mapView.renderer.getContext().getShaderInfoLog = (x: any) => {
            return "";
        };

        const geoJsonDataSource = new OmvDataSource({
            decoder: new OmvTileDecoder(),
            dataProvider: new GeoJsonDataProvider(
                "geojson",
                typeof options.geoJson === "string"
                    ? new URL(options.geoJson, window.location.href)
                    : options.geoJson,
                { tiler: new GeoJsonTiler() }
            ),
            name: "geojson",
            styleSetName: "geojson"
        });

        mapView.addDataSource(geoJsonDataSource);

        await waitForEvent(mapView, MapViewEventNames.FrameComplete);

        await ibct.assertCanvasMatchesReference(canvas, options.testImageName);
    }