declare namespace Ext {
    export namespace util {
        export interface HistoryConfig {
            listeners?: object;
        }

        export class History extends Ext.Base  {
            public useTopWindow?: any;
            public add(token?: string, preventDuplicates?: boolean): void;
            public back(): void;
            public forward(): void;
            public getToken(): string;
            public init(onReady?: CallableFunction, scope?: object): void;
        }
    }
}