export declare const addClassMeta: <T>(key: string | symbol, mapFn: (prev: T | undefined) => T) => ClassDecorator;
export declare function getClassMeta<T>(target: object, key: string | symbol): T | undefined;
export declare const addClassLabel: (key: string, label: string) => ClassDecorator;
export declare const getClassLabels: (target: object) => Map<string, string>;
export declare const addClassTag: (tag: string) => ClassDecorator;
export declare const getClassTags: (target: object) => Set<string>;