Is it possible to add new wms basemaps?
I tried it adding this to basemaps in app.js:
{"id": "GEBCO", "type": "tiled", "label": "GEBCO", "url": "https://www.gebco.net/data_and_products/gebco_web_services/web_map_service/mapserv?"}

And this to the set basemap function

} else if (basemap.type === 'tiled'){
if (basemap.id === 'GEBCO') {
options.attribution = "GEBCO";

But still can't visualize the layer although it appars in the basemaps list. Do you know what I'm doing wrong?

Thanks!