supportsTile method
Returns true if MapDatabase contains the given tile.
@param tile tile to be rendered. @return true if tile is part of database.
Implementation
@override
bool supportsTile(Tile tile, Projection projection) {
// you may want to show neighbouring tiles too in order to display labels.
return true;
// Projection projection = MercatorProjection.fromZoomlevel(tile.zoomLevel);
// for (PointOfInterest poi in pointOfInterests) {
// if (projection.boundingBoxOfTile(tile).containsLatLong(poi.position)) return true;
// }
// for (Way way in ways) {
// for (List<ILatLong> list in way.latLongs) {
// for (ILatLong latLong in list) {
// if (projection.boundingBoxOfTile(tile).containsLatLong(latLong)) return true;
// }
// }
// }
// return false;
}