import { Ref } from 'vue';
import { TooltipContext } from '../types/index';
export declare const ECHARTS_TOOLTIP_KEY: unique symbol;
interface TooltipOption<T> {
    options: Ref<T>;
    update: (data: T) => void;
}
export declare const useTooltip: <T>(config?: TooltipOption<T>) => TooltipContext | null;
export {};