import { findUnknownExtensions } from "https://deno.land/x/polkadot@0.2.37/types/extrinsic/signedExtensions/index.ts";
Parameters
optional
userExtensions: ExtDef = [UNSUPPORTED]x/polkadot/types/extrinsic/signedExtensions/index.ts>findUnknownExtensions
import { findUnknownExtensions } from "https://deno.land/x/polkadot@0.2.37/types/extrinsic/signedExtensions/index.ts";