function unimplementedimport { unimplemented } from "https://dotland.deno.dev/std@0.223.0/assert/mod.ts"; unimplemented(msg?: string): neverUse this to stub out methods that will throw when invoked. ExamplesExample 1 import { unimplemented } from "https://deno.land/std@0.223.0/assert/unimplemented.ts"; unimplemented(); // Throws Parametersoptionalmsg: stringReturnsnever