interface Refimport { type Ref } from "https://dotland.deno.dev/x/vue3_reactivity@v1.0.0/mod.ts"; Type ParametersoptionalT = anyPropertiesvalue: T[RefSymbol]: trueType differentiator only. We need this to be in public d.ts but don't want it to show up in IDE autocomplete, so we use a private Symbol instead.