import Type from './Type';
import Validation, { IdentifierPath } from '../Validation';
import RuntimeTypeErrorItem from '../errorReporting/RuntimeTypeErrorItem';
export default class UnionType<T> extends Type<T> {
    typeName: string;
    readonly types: Type<any>[];
    private _determinantProperty;
    constructor(types: Type<any>[]);
    get determinantProperty(): [string | number | symbol, Map<any, Type<any>>] | null;
    errors(validation: Validation, path: IdentifierPath, input: any): Iterable<RuntimeTypeErrorItem>;
    accepts(input: any): input is T;
    get acceptsSomeCompositeTypes(): boolean;
    toString(options?: {
        formatForMustBe?: boolean;
    }): string;
}