import { Type } from '@nestjs/common';
import { ResolveTypeFn } from '../interfaces/resolve-type-fn.interface';
export interface UnionOptions<T extends Type<unknown>[] = any[]> {
    name: string;
    description?: string;
    resolveType?: ResolveTypeFn<any, any>;
    types: () => T;
}
export declare type ArrayElement<ArrayType extends readonly unknown[]> = ArrayType[number];
export declare type Union<T extends any[]> = InstanceType<ArrayElement<T>>;
export declare function createUnionType<T extends Type<unknown>[] = any[]>(options: UnionOptions<T>): Union<T>;