import { FetchBaseQueryError } from '@reduxjs/toolkit/query';
/**
 * Type predicate to narrow an unknown error to `FetchBaseQueryError`
 */
export declare function isFetchBaseQueryError(error: unknown): error is FetchBaseQueryError;
/**
 * Type predicate to narrow an unknown error to an object with a string 'message' property
 */
export declare function isErrorWithMessage(error: unknown): error is {
    message: string;
};