import { Ref } from 'vue';
import { FeatureContext } from '../types';
export declare const ECHARTS_FEATURE_KEY: unique symbol;
interface UseFeatureOptions<O> {
    options: Ref<O>;
    update: (data: O) => void;
}
export declare function useFeature<O>(config?: Partial<UseFeatureOptions<O>>): FeatureContext;
export {};