function arrayFlattenimport { arrayFlatten } from "https://dotland.deno.dev/x/polkadot@0.2.35/util/array/index.ts"; arrayFlatten<T>(arrays: readonly T[][]): T[]Examples import { arrayFlatten } from 'https://deno.land/x/polkadot@0.2.35/util/mod.ts'; arrayFlatten([[1, 2], [3, 4], [5]]); // [1, 2, 3, 4, 5] Type ParametersTParametersarrays: readonly T[][]ReturnsT[]