declare namespace Ext {
    export namespace util {
        export interface MementoConfig {
        }

        export class Memento extends Ext.Base  {
            public target?: any;
            public capture(props?: string | string[], target?: object): void;
            public constructor(target?: object, props?: string | string[]);
            public remove(props?: string | string[]): void;
            public restore(props?: string | string[], clear?: boolean, target?: object): void;
            public restoreAll(clear?: boolean, target?: object): void;
        }
    }
}