Interface EnvironmentRootListing

A current answer about root-level groups (structurally data/scene-loader/cache/root-listing.ts::RootListing): lists is true / false from an index fetched from the network this load, undefined when there is none; format is the store's format when known.

interface EnvironmentRootListing {
    lists(group: string): boolean | undefined;
    format: StoreFormat | null;
    fromOpenedIndex?: boolean;
}