function getSpecExtensionsimport { getSpecExtensions } from "https://deno.land/x/polkadot@0.2.23/types-known/mod.ts"; getSpecExtensions(unnamed 0: Registry,chainName: Text | string,specName: Text | string,): ExtDefParametersunnamed 0: RegistrychainName: Text | stringspecName: Text | stringReturnsExtDef