diff --git a/src/components/map/TiledLayer.tsx b/src/components/map/TiledLayer.tsx
index c4b55e0..b513f9c 100644
--- a/src/components/map/TiledLayer.tsx
+++ b/src/components/map/TiledLayer.tsx
@@ -4,23 +4,20 @@ import { range, isEqual } from 'lodash';
 import { Rectangle, TileFactory, TileKeyObject } from './types';
 import tileUri from './uris';
 
+/**
+ * @hidden
+ */
 export const thisIsAModule = true;
 
 /**
- * A cache to store tiles without being subject to re-initialization when components are unmounted/remounted.
- *
- * This cache is a map of map, the first key identifying the `<TiledLayer` and the second one for `<Tile>`s.
- *
- * Idea stolen [on the web](https://dev.to/tiagof/react-re-mounting-vs-re-rendering-lnh)
- *
- * TODO: housekeeping
  *
  */
+
 declare global {
   var cacheForTiledLayer: any;
 }
 
-export {};
+//export {};
 
 globalThis.cacheForTiledLayer = new Map();
 
@@ -44,8 +41,17 @@ export interface TiledLayerProperties {
  * This component has no need to know the number nor the size of its tiles: tiles can be added when needed and
  * its unit is the tile size (the parent component needs to transform its enclosing SVG group to adapt its units)
  *
+ * The `globalThis.cacheForTiledLayer` global variable is used as a cache to store tiles without being subject
+ * to re-initialization when components are unmounted/remounted.
+ *
+ * This cache is a map of map, the first key identifying the `<TiledLayer` and the second one for `<Tile>`s.
+ *
+ * Idea stolen [on the web](https://dev.to/tiagof/react-re-mounting-vs-re-rendering-lnh)
+ *
+ * TODO: cache housekeeping
+ * 
  * TODO: test tiles'X and Y boundaries.
- * TODO: housekeeping
+ * 
  * TODO: remove tileFactory to facilitate memoisation.
  *
  */