type RawResponse<T> = T[] | {
    data: T[];
} | {
    items: T[];
};
type ClientFetcher<T> = () => Promise<RawResponse<T>>;
type ServerFetcher<T> = (query: string) => Promise<RawResponse<T>>;
type Fetcher<T> = ClientFetcher<T> | ServerFetcher<T>;
type Mapper<T, R> = (items: T[]) => R[];
export interface OptionItem {
    label: string;
    value: string | number;
    [key: string]: any;
}
export interface ToOptionsConfig<T> {
    label: keyof T | ((item: T) => string);
    value: keyof T;
}
export interface NormalizedFetchResult<R> {
    (filter?: string): Promise<R[]>;
    clearCache: () => void;
}
export declare function toOptions<T>(items: T[]): OptionItem[];
export declare function toOptions<T>(config: ToOptionsConfig<T>): Mapper<T, OptionItem>;
export declare function normalizedFetch<T, R>(fetcher: Fetcher<T>, mapper: Mapper<T, R>, options?: {
    timeout?: number;
}): NormalizedFetchResult<R>;
export {};
//# sourceMappingURL=fetch.d.ts.map