import { Widget } from "../../core/widget";
export declare class Expander extends Widget {
    static xtype: string;
    static EVENT_EXPAND: string;
    static EVENT_COLLAPSE: string;
    static EVENT_TRIGGER_CHANGE: string;
    static EVENT_CHANGE: string;
    static EVENT_AFTER_INIT: string;
    static EVENT_BEFORE_POPUPVIEW: string;
    static EVENT_AFTER_POPUPVIEW: string;
    static EVENT_BEFORE_HIDEVIEW: string;
    static EVENT_AFTER_HIDEVIEW: string;
    populate(items?: any, ...args: any[]): void;
    setValue(v: string): void;
    getValue(): string;
    isViewVisible(): boolean;
    isExpanded(): boolean;
    showView(): void;
    hideView(): void;
    getView<T>(): T;
    getAllLeaves<T>(): T[];
    getNodeById<T>(id: string): T;
    getNodeByValue<T>(v: string): T;
    destroy(): void;
}