How to use the @here/harp-geoutils.TileKey.fromRowColumnLevel function in @here/harp-geoutils

private computeRequiredInitialRootTileKeys(worldCenter: THREE.Vector3) {
        this.m_rootTileKeys = [];
        const rootTileKey = TileKey.fromRowColumnLevel(0, 0, 0);
        const tileWrappingEnabled = this.mapView.projection.type === ProjectionType.Planar;

        if (!tileWrappingEnabled || !this.m_tileWrappingEnabled) {
            this.m_rootTileKeys.push(new TileKeyEntry(rootTileKey, 0, 0, 0));
            return;
        }

        const worldGeoPoint = this.mapView.projection.unprojectPoint(worldCenter);
        const startOffset = Math.round(worldGeoPoint.longitude / 360.0);

        // This algorithm computes the number of offsets we need to test. The following diagram may
        // help explain the algorithm below.
        //
        //   |🎥
        //   |.\ .
        //   | . \  .