function util.isStringimport { util } from "https://dotland.deno.dev/x/polkadot@0.2.45/mod.ts"; const { isString } = util; isString(value: unknown): value is AnyStringExamples import { isString } from 'https://deno.land/x/polkadot@0.2.45/util/mod.ts'; console.log('isString', isString('test')); // => true Parametersvalue: unknownReturnsvalue is AnyString