> ## Documentation Index
> Fetch the complete documentation index at: https://docs.forterulesengine.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Either

> v0.20.5

> **Either**\<`T`, `U`> = `NonNullable`\<[`Left`](./Left)\<`T`> | [`Right`](./Right)\<`U`>>

Defined in: [src/modules/types.ts:711](https://github.com/Forte-Service-Company-Ltd/forte-rules-engine-sdk/blob/40cc8388cecd8ee445b00b9df2b681cff8552ece/src/modules/types.ts#L711)

## Type Parameters

| Type Parameter |
| -------------- |
| `T`            |
| `U`            |