interface DataHolderimport { type DataHolder } from "https://dotland.deno.dev/x/servest@v1.3.4/mod.ts"; Methodsset<T = unknown>(key: Key, value: T): voidget<T = unknown>(key: Key): T | undefinedgetString(key: Key): string | undefinedgetNumber(key: Key): number | undefinedgetBoolean(key: Key): boolean | undefineddelete(key: Key): voidimport DataHolderimport { DataHolder } from "https://dotland.deno.dev/x/servest@v1.3.4/mod.ts";