function util.u8aConcatStrictimport { util } from "https://dotland.deno.dev/x/polkadot@0.2.23/mod.ts"; const { u8aConcatStrict } = util; u8aConcatStrict(u8as: readonly Uint8Array[], length?): Uint8ArrayParametersu8as: readonly Uint8Array[]optionallength = [UNSUPPORTED]ReturnsUint8Array