interface NamespaceConfig {
    start: number;
}
declare const DEFAULT_CONFIG: Record<string, NamespaceConfig>;
type ZIndexState = {
    initial: number;
    usedZIndex: Set<number>;
};
export declare const stateMap: Record<string, ZIndexState>;
export declare const cleanState: () => void;
export declare function useZIndex(namespace?: keyof typeof DEFAULT_CONFIG): readonly [import("vue").Ref<number, number>, () => number, () => void];
export {};