function isErrorimport { isError } from "https://dotland.deno.dev/x/polkadot@0.2.35/util/bundle.ts"; isError(value: unknown): value is ErrorExamples import { isError } from 'https://deno.land/x/polkadot@0.2.35/util/mod.ts'; console.log('isError', isError(new Error('message'))); // => true Parametersvalue: unknownReturnsvalue is Error