export declare function promiseMaybeHasKeys<T extends string>(name: string, mixed: any, keys: T[]): Promise<null | undefined | ({
    [key: string]: any;
})>;
export declare function promiseMaybeHasKeysHandler<T extends string>(keys: T[]): (name: string, mixed: any) => Promise<null | undefined | ({
    [key: string]: any;
})>;
export declare function promiseMaybeNotHasKeys<T extends string>(name: string, mixed: any, keys: T[]): Promise<null | undefined | ({
    [key: string]: any;
})>;
export declare function promiseMaybeNotHasKeysHandler<T extends string>(keys: T[]): (name: string, mixed: any) => Promise<null | undefined | ({
    [key: string]: any;
})>;