import * as t from "io-ts";
import { Validation } from "io-ts";
import { Maybe } from "./util-types";
export declare class MaybeType<RT> extends t.Type<Maybe<RT>, any, unknown> {
    type: t.Type<RT>;
    name: string;
    readonly _tag: "MaybeType";
    constructor(type: t.Type<RT>, name?: string);
    decode(input: any): Validation<Maybe<RT>>;
}
export declare const maybe: <T>(baseType: t.Type<T, any, unknown>, name?: string | undefined) => MaybeType<T>;
export declare const maybeArray: <T>(baseType: t.Type<T, any, unknown>, name?: string | undefined) => t.UnionC<[t.Type<T, any, unknown>, t.ArrayC<t.Type<T, any, unknown>>]>;