How to use grid-index - 5 common examples

constructor(tileID: OverscaledTileID, promoteId?: ?PromoteIdSpecification) {
        this.tileID = tileID;
        this.x = tileID.canonical.x;
        this.y = tileID.canonical.y;
        this.z = tileID.canonical.z;
        this.grid = new Grid(EXTENT, 16, 0);
        this.grid3D = new Grid(EXTENT, 16, 0);
        this.featureIndexArray = new FeatureIndexArray();
        this.promoteId = promoteId;
    }

constructor(tileID: OverscaledTileID, promoteId?: ?PromoteIdSpecification) {
        this.tileID = tileID;
        this.x = tileID.canonical.x;
        this.y = tileID.canonical.y;
        this.z = tileID.canonical.z;
        this.grid = new Grid(EXTENT, 16, 0);
        this.grid3D = new Grid(EXTENT, 16, 0);
        this.featureIndexArray = new FeatureIndexArray();
        this.promoteId = promoteId;
    }

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

};
}

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);

register('StylePropertyFunction', StylePropertyFunction);
register('StyleExpression', StyleExpression, {omit: ['_evaluator']});

register('ZoomDependentExpression', ZoomDependentExpression);
register('ZoomConstantExpression', ZoomConstantExpression);
register('CompoundExpression', CompoundExpression, {omit: ['_evaluate']});
for (const name in expressions) {
    if ((expressions[name]: any)._classRegistryKey) continue;

(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);