variable booleanimport { boolean } from "https://deno.land/x/fun@v2.0.0-alpha.10/decoder.ts"; A Decoder that validates booleans. ExamplesExample 1 import * as D from "./decoder.ts"; const result1 = D.boolean(null); // Left(DecodeError) const result2 = D.boolean(true); // Right(true) typeDecoder<unknown, boolean>