How to use the grid-index.serialize function in grid-index

(Object.defineProperty: any)(klass, '_classRegistryKey', {
        value: name,
        writeable: false
    });
    registry[name] = {
        klass,
        omit: options.omit || [],
        shallow: options.shallow || []
    };
}

register('Object', Object);

type SerializedGrid = { buffer: ArrayBuffer };

Grid.serialize = function serialize(grid: Grid, transferables?: Array): SerializedGrid {
    const buffer = grid.toArrayBuffer();
    if (transferables) {
        transferables.push(buffer);
    }
    return {buffer};
};

Grid.deserialize = function deserialize(serialized: SerializedGrid): Grid {
    return new Grid(serialized.buffer);
};
register('Grid', Grid);

register('Color', Color);
register('Error', Error);
register('ResolvedImage', ResolvedImage);