export declare type LayerStackPriority = 'high' | 'low' | number;
export interface LayerStackEntryOptions<TItem = {}> {
    item: TItem;
    priority: LayerStackPriority;
    tags?: string | string[];
}
export interface LayerStackEntry<TItem = {}> extends LayerStackEntryOptions<TItem> {
    id: string;
    sequence: number;
    tags: string[];
}
export declare type LayerStackEntryWithOptions<TItem = {}, TEntryOptions extends LayerStackEntryOptions = LayerStackEntryOptions> = TEntryOptions & LayerStackEntry<TItem>;
export declare class LayerStack<TItem = {}, TEntryOptions extends LayerStackEntryOptions = LayerStackEntryOptions<TItem>> {
    private _entries;
    private _nextSequence;
    add(item: TItem, priority?: LayerStackPriority, tags?: string | string[]): TEntryOptions;
    addEntry(entryOptions: TEntryOptions): LayerStackEntryWithOptions<TItem, TEntryOptions>;
    get entries(): Array<LayerStackEntryWithOptions<TItem, TEntryOptions>>;
    getEntries(filter: (entry: LayerStackEntryWithOptions<TItem, TEntryOptions>) => boolean): LayerStackEntryWithOptions<TItem, TEntryOptions>[];
    getItems(filter: (entry: LayerStackEntryWithOptions<TItem, TEntryOptions>) => boolean): LayerStackEntryWithOptions<TItem, TEntryOptions>[];
    getItemsByTag(tags: string | string[], matchType?: 'and' | 'or'): LayerStackEntryWithOptions<TItem, TEntryOptions>[];
    private getItemsFromEntries;
    get items(): TItem[];
}