/**
 * 事件绑定
 * @param target
 * @param eventType
 * @param callback
 * @returns {{remove(): void}}
 */
export declare const addEvent: (target: any, eventType: string, callback: () => void) => {
    remove(): void;
} | undefined;
export declare const downloadSvgFn: (svg: SVGAElement, width: number, height: number, chartName: string, rootName: string) => void;
export declare const downloadImpByChart: (svg: SVGAElement, chartName: string, rootName: string, zoomClassName?: string) => false | undefined;
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