declare namespace Ext {
    export namespace sparkline {
        export interface BarBaseConfig {
            disableTooltips?: boolean;
            highlightColor?: string;
            highlightLighten?: number;
            lineColor?: string;
            tipTpl?: string | Ext.XTemplate;
            tooltipPrefix?: string;
            tooltipSkipNull?: boolean;
            tooltipSuffix?: string;
            values?: number[];
        }

        export class BarBase extends Ext.sparkline.Base  {
        }
    }
}