class typesCodec.BTreeMap extends CodecMap<K, V>import { typesCodec } from "https://dotland.deno.dev/x/polkadot@0.2.45/mod.ts"; const { BTreeMap } = typesCodec; Type ParametersoptionalK extends Codec = CodecoptionalV extends Codec = CodecStatic Methodswith<K extends Codec, V extends Codec>(keyType: CodecClass<K> | string, valType: CodecClass<V> | string): CodecClass<CodecMap<K, V>>