export declare class ItemsViewModel {
    private readonly vm?;
    private items;
    private identifier;
    constructor(vm?: any);
    get(item: Object): ViewModel;
    all(): ViewModel[];
    delete(item: Object): ItemsViewModel;
    deleteAll(): ItemsViewModel;
    identifyBy(identifier: (item: Object) => number): ItemsViewModel;
    forEach(fn: any): any;
}
export declare class ViewModel {
    protected $root: any;
    enabled: boolean;
    visible: boolean;
    constructor(vm?: Object, $root?: any);
    init(params?: any): this;
    isHead(): boolean;
    /**
     * Toggle both "enabled" and "visible" flags
     */
    toggle(enabled: any): void;
    /**
     * Toggle the "enabled" flag
     */
    toggleEnabled(enabled: any): boolean;
    /**
     * Toggle the "visible" flag
     */
    toggleVisible(visible: any): boolean;
    reload(): any;
    /**
     * Create a view model for items. Useful for managing view state of items in a list.
     */
    createItemsVm(vm?: any): ItemsViewModel;
    forEach(fn: any): any;
}
/**
 * Create a view model object for use in the view layer
 *
 * @param vm  Plain object representation of the view model. Nested objects will be also converted to ViewModel instances.
 */
export declare function create(vm?: Object, root?: any): ViewModel;