export declare enum HasKeysErrorCode {
    IS_NULL = "IS_NULL",
    IS_UNDEFINED = "IS_UNDEFINED",
    DOES_NOT_HAVE_KEY = "DOES_NOT_HAVE_KEY",
}
export declare function checkHasKeys<T extends string>(mixed: any, keys: T[]): undefined | HasKeysErrorCode;
export declare enum NotHasKeysErrorCode {
    IS_NULL = "IS_NULL",
    IS_UNDEFINED = "IS_UNDEFINED",
    HAS_KEY = "HAS_KEY",
}
export declare function checkNotHasKeys<T extends string>(mixed: any, keys: T[]): undefined | NotHasKeysErrorCode;