method Linkage.withKeyimport { Linkage } from "https://dotland.deno.dev/x/polkadot@0.2.24/types/index.ts"; withKey<O extends Codec>(Type: CodecClass | string): CodecClass<Linkage<O>>Type ParametersO extends CodecParametersType: CodecClass | stringReturnsCodecClass<Linkage<O>>