class Errimport { Err } from "https://deno.land/x/valita@v0.2.9/mod.ts"; ConstructorsnewErr(issueTree: IssueTree)Propertiesprivateoptional_issues: Issue[]privateoptional_message: stringreadonlyissues: readonly Issue[]readonlymessage: stringreadonlyok: booleanMethodsthrow(): never