function u8aConcatStrictimport { u8aConcatStrict } from "https://deno.land/x/polkadot@0.2.17/util/u8a/concat.ts"; u8aConcatStrict(u8as: readonly Uint8Array[], length?): Uint8ArrayParametersu8as: readonly Uint8Array[]optionallength = [UNSUPPORTED]ReturnsUint8Array