ConstA knob is a plain display value in PlacesModuleConfig, at the path its id names.
title and customTypeface, cluster.source.properties, icon.default.image,
icon.categoryIcons, icon.mapping, connections.label.title, layers, beforeLayerConfig,
extraFeatureProps and events aren't knobs, as they take callbacks, images, font files,
structured or MapLibre values.entryPoints draws nothing until it is set.
cluster applies only under pin-clustered.
Every places knob with its kind, description, range or options and, where one value holds everywhere, its default. It is static data, readable with no map loaded.