ConstA knob is a plain display value in BaseMapModuleConfig, at the path its id names. None
carries a default: unset, a layer is drawn as the style ships it, and some groups ship hidden.
The basemap.<group>, buildings.footprints, buildings.3d and roads.shields
StylingModule knobs toggle the same groups through this module. Not knobs: events.
Every base-map knob with its kind and description:
visible, then one toggle per layer group in baseMapLayerGroupNames order. Static data, readable with no map loaded.