Awesome, thanks! There seem to be a few more cases of the same problem left though (hope you don't mind!):

- `DziTileSource` constructor (I thought I left a comment for that as well, but apparently I didn't) ...
- `DziTileSource#supports`
- `IIIFTileSource#supports`
- `LegacyTileSource#configure`
- `LegacyTileSource#getTileUrl`
- `LegacyTileSource#supports`
- `OsmTileSource#configure`
- `OsmTileSource#supports`
- `ReferenceStrip#update`
- `TileSourceCollection` constructor
- `TileSourceCollection#configure`
- `TmsTileSource#configure`
- `TmsTileSource#supports`