ConstA knob is a plain display value in ReachableRangesModuleConfig, at the path its id names.
Not knobs: beforeLayerConfig, layers, lineLabel.title and lineLabel.customTypeface, which take
structured, MapLibre or function values, and events.
Every reachable ranges knob with its kind, description, range or options and, where one value holds everywhere, its default: the module-wide knobs, the bands' fill and border, how a hovered or clicked band draws, then the labels along each range's border. Static data, readable with no map loaded.