Example 2: Using Referee assert equals to test if two arrays are equal.javascript const { assert } = require('referee'); const arr1 = [1, 2, 3]; const arr2 = [1, 2, 3]; const arr3 = [1, 2, 4]; assert.equals(arr1, arr2); // returns true assert.equals(arr1, arr3); // returns false ``` The Referee library is a testing library for Node.js and the browser that provides a variety of assertions and matchers. It can be installed and used via npm by installing the `referee` package.