function isNullimport { isNull } from "https://deno.land/x/isx@1.5.0/is_null.ts"; isNull(input: unknown): input is nullWhether the input is null or not. ExamplesExample 1 import { isNull } from "https://deno.land/x/isx@$VERSION/is_null.ts" import { assertEquals } from "https://deno.land/std/testing/asserts.ts" assertEquals(isNull(null), true) assertEquals(isNull(undefined), false) Parametersinput: unknown Any input. Returnsinput is null