/**
 * 把数组按照指定 key 转换为映射表
 * [{id:1},{id:2}] =>  {"1":{id:1}, "2":{id:2}}
 *
 * 如果不指定 key 就把元素当成 Key
 * ["ee","aa","cc"] => {"ee":true, "aa":true, "cc":true}
 *
 */
export declare function arrayToMap<T>(arr: T[], key?: string | ((item: T) => string), options?: {
    isKeyPath?: boolean;
}): {
    [key: string]: T;
};
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