function utilCrypto.mnemonicGenerateimport { utilCrypto } from "https://dotland.deno.dev/x/polkadot@0.2.35/mod.ts"; const { mnemonicGenerate } = utilCrypto; mnemonicGenerate(numWords?: | 12 | 15 | 18 | 21 | 24, onlyJs?: boolean): stringExamples import { mnemonicGenerate } from 'https://deno.land/x/polkadot@0.2.35/util-crypto/mod.ts'; const mnemonic = mnemonicGenerate(); // => string ParametersoptionalnumWords: | 12 | 15 | 18 | 21 | 24 = [UNSUPPORTED]optionalonlyJs: booleanReturnsstring