isRight
import { isRight } from "https://github.gh-proxy.cn/raw.githubusercontent.com/baetheus/fun/main/these.ts";Check if a These is a Right (complete success).
@example
import { isRight, left, right, both } from "./these.ts";
console.log(isRight(left("Error"))); // false
console.log(isRight(right(42))); // true
console.log(isRight(both("Warning", 42))); // false