function u8aConcatStrictimport { u8aConcatStrict } from "https://deno.land/x/polkadot@0.2.19/util/u8a/index.ts"; u8aConcatStrict(u8as: readonly Uint8Array[], length?): Uint8ArrayParametersu8as: readonly Uint8Array[]optionallength = [UNSUPPORTED]ReturnsUint8Array