import type { Request } from 'routup';
import type { RequestEnv } from '../type';
export declare function useRequestEnv(req: Request): RequestEnv;
export declare function useRequestEnv<T extends keyof RequestEnv>(req: Request, key: T): RequestEnv[T];
export declare function setRequestEnv<T extends keyof RequestEnv>(req: Request, key: T, value: RequestEnv[T]): void;
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