prepare
Download incremental updates for a tile region. This method can be used as the first step when updating a tile region. It will download incremental updates for the tiles in the region, using the new tileset descriptors provided in the load options. Note that new geometry or metadata shouldn't be specified and will be ignored. Once the operation completes successfully, the updates can be applied by invoking the applyTileRegionUpdate() method.
Parameters
The tile region to be updated.
Specify what data to update and other options. Geometry is ignored and the existing geometry of the tile region is used determine which tiles need update. Metadata is ignored.
Invoked multiple times to report progess of the operation.
Invoked only once upon success, failure, or cancelation of the operation.