function util.isFunctionimport { util } from "https://dotland.deno.dev/x/polkadot@0.2.45/mod.ts"; const { isFunction } = util; isFunction(value: unknown): value is FnTypeExamples import { isFunction } from 'https://deno.land/x/polkadot@0.2.45/util/mod.ts'; isFunction(() => false); // => true Parametersvalue: unknownReturnsvalue is FnTypeimport util.isFunctionimport { util } from "https://dotland.deno.dev/x/polkadot@0.2.45/mod.ts"; const { isFunction } = util;