nsole.log(<span class="hljs-keyword">set</span>.size);

// remove an item from the <span class="hljs-keyword">set</span> by key
<span class="hljs-keyword">set</span>.delete('a');

// will log ['b', 'c']
console.log(<span class="hljs-keyword">set</span>.values());

// will log [['b', 'b'], ['c', 'c']]
console.log(<span class="hljs-keyword">set</span>.entries());

// will log ['b', 'c']
console.log(<span class="hljs-keyword">set</span>.keys());

// removes everything from the <span class="hljs-keyword">set</s