export declare class CustomElementRegistryImplementation implements CustomElementRegistry {
    private registry;
    private listenersByName;
    define(name: string, Constructor: CustomElementConstructor, _options?: ElementDefinitionOptions): void;
    get(name: string): CustomElementConstructor | undefined;
    getName(Constructor: CustomElementConstructor): string | null;
    whenDefined(name: string): Promise<CustomElementConstructor>;
    upgrade(_root: Node): void;
}
//# sourceMappingURL=CustomElementRegistry.d.ts.map