export declare function assertHasKeys<T extends string>(name: string, mixed: any, keys: T[]): ({
    [key: string]: any;
}) | never;
export declare function assertHasKeysHandler<T extends string>(keys: T[]): (name: string, mixed: any) => ({
    [key: string]: any;
}) | never;
export declare function assertNotHasKeys<T extends string>(name: string, mixed: any, keys: T[]): ({
    [key: string]: any;
}) | never;
export declare function assertNotHasKeysHandler<T extends string>(keys: T[]): (name: string, mixed: any) => ({
    [key: string]: any;
}) | never;