declare class Item { content: any; priority: number; key?: number; constructor(content: any, priority?: number); } /** * The `ItemList` class collects items and then arranges them into an array * by priority. */ export default class ItemList { /** * The items in the list */ items: { [key: string]: Item; }; /** * Check whether the list is empty. */ isEmpty(): boolean; /** * Check whether an item is present in the list. */ has(key: string): boolean; /** * Get the content of an item. */ get(key: string): any; /** * Add an item to the list. * * @param key A unique key for the item. * @param content The item's content. * @param [priority] The priority of the item. Items with a higher * priority will be positioned before items with a lower priority. */ add(key: string, content: any, priority?: number): this; /** * Replace an item in the list, only if it is already present. */ replace(key: string, content?: any, priority?: number): this; /** * Remove an item from the list. */ remove(key: string): this; /** * Merge another list's items into this one. */ merge(items: this): this; /** * Convert the list into an array of item content arranged by priority. Each * item's content will be assigned an `itemName` property equal to the item's * unique key. */ toArray(): any[]; } export {};