// export const scopedVersions = new WeakMap<ShadowRoot | Document, WeakMap<{new(): HTMLElement}, string>>();
// export function version(classes: {new():  HTMLElement}[], versionFn: (cls: {new(): HTMLElement}) => [string, string], root: ShadowRoot | Document){
//     if(!scopedVersions.has(root)){
//         scopedVersions.set(root, {});
//     }
//     const shadowDOMVersionLookup = scopedVersions.get(root)!;
//     for(const cls of classes){
//         const [version, selector] = versionFn(cls);
//         shadowDOMVersionLookup[selector] = version;
//     }
// }