class types.Linkage extends Structimport { types } from "https://deno.land/x/polkadot@0.2.22/mod.ts"; const { Linkage } = types; ConstructorsnewLinkage(registry: Registry,Type: CodecClass | string,value?: unknown,)Type ParametersT extends CodecPropertiesreadonlynext: Option<T>readonlyprevious: Option<T>MethodstoRawType(): stringtoU8a(): Uint8ArrayStatic MethodswithKey<O extends Codec>(Type: CodecClass | string): CodecClass<Linkage<O>>