function unreachableDeprecatedDeprecatedThis will be removed in 1.0.0. Import from https://deno.land/std/assert/unreachable.ts instead. import { unreachable } from "https://dotland.deno.dev/std@0.224.0/testing/asserts.ts"; unreachable(): neverUse this to assert unreachable code. ExamplesExample 1 import { unreachable } from "https://deno.land/std@0.224.0/testing/asserts.ts"; unreachable(); // Throws Returnsnever