declare namespace Ext {
    export namespace chart {
        export namespace interactions {
            export interface CrossZoomConfig {
                axes?: object | [];
                chart?: Ext.chart.AbstractChart;
                enabled?: boolean;
                listeners?: object;
            }

            export class CrossZoom extends Ext.chart.interactions.Abstract  {
                public getAxes(): void;
                public setAxes(): void;
            }
        }
    }
}