function createCodecimport { createCodec } from "https://deno.land/x/scale@v0.13.0/common/codec.ts"; createCodec<I, O = I>(_codec: ThisType<Codec<I, O>> & Pick<Codec<I, O>, | "_encode" | "_decode" | "_assert" | "_staticSize" | "_metadata">): Codec<I, O>Type ParametersIoptionalO = IParameters_codec: ThisType<Codec<I, O>> & Pick<Codec<I, O>, | "_encode" | "_decode" | "_assert" | "_staticSize" | "_metadata">ReturnsCodec<I, O>