import type { CloudFormationValue } from "./common";
export declare const FN_LENGTH = "Fn::Length";
export declare type LengthKey = typeof FN_LENGTH;
export interface Length {
    'Fn::Length': CloudFormationValue<any[]>;
}
export declare const isLength: import("@altostra/type-validations").ObjectOfTypeValidation<Length>;
export declare function mkLength(array: CloudFormationValue<any[]>): Length;