interface KindUnknownDecoder
implements Kind
import { type KindUnknownDecoder } from "https://deno.land/x/fun@v2.0.0/decoder.ts";
Specifies Decoder<unknown, A> as a Higher Kinded Type, with covariant parameter A corresponding to the 0th index of any substitutions. This is a specific Kind used to construct the Schemable Decoder.