staticgetShelf(list:ResourceShelfSources, done:ResourceShelf ‑> Void, ?onProgress:Float ‑> Void, ?failed:ResourceError ‑> Void):VoidstaticloadShelf(list:ResourceShelfSources, done:ResourceShelf ‑> Void, ?onProgress:Float ‑> Void, ?failed:ResourceError ‑> Void):VoidstaticreloadShelf(list:ResourceShelfSources, ?done:ResourceShelf ‑> Void, ?onProgress:Float ‑> Void, ?failed:ResourceError ‑> Void):Void