declare global {
    interface Generator<T = unknown, TReturn = any, TNext = unknown> {
        union(this: Generator<number, TReturn, TNext>, that: Generator<number, TReturn, TNext> | number[]): Generator<number, TReturn, TNext>;
        union(this: Generator<string, TReturn, TNext>, that: Generator<string, TReturn, TNext> | string[]): Generator<string, TReturn, TNext>;
        union(this: Generator<boolean, TReturn, TNext>, that: Generator<boolean, TReturn, TNext> | boolean[]): Generator<boolean, TReturn, TNext>;
        union(that: Generator<T, TReturn, TNext> | T[], comparitor: (a: T, b: T) => boolean): Generator<T, TReturn, TNext>;
    }
    interface AsyncGenerator<T = unknown, TReturn = any, TNext = unknown> {
        union(this: AsyncGenerator<number, TReturn, TNext>, that: AsyncGenerator<number, TReturn, TNext> | Generator<number, TReturn, TNext> | number[]): AsyncGenerator<number, TReturn, TNext>;
        union(this: AsyncGenerator<string, TReturn, TNext>, that: AsyncGenerator<string, TReturn, TNext> | Generator<string, TReturn, TNext> | string[]): AsyncGenerator<string, TReturn, TNext>;
        union(this: AsyncGenerator<boolean, TReturn, TNext>, that: AsyncGenerator<boolean, TReturn, TNext> | Generator<boolean, TReturn, TNext> | boolean[]): AsyncGenerator<boolean, TReturn, TNext>;
        union(that: AsyncGenerator<T, TReturn, TNext> | Generator<T, TReturn, TNext> | T[], comparitor: (a: T, b: T) => boolean): AsyncGenerator<T, TReturn, TNext>;
    }
}
export {};