title: Nicer code for toggling a bool member
body: <p>Please note that the question isn't about negating a boolean value but rather about the most elegant, efficient and nicest way of doing so.</p>
  
  <p>Upon a click on a toggle button, I execute the following code to store the new state in a private <code>bool</code>.</p>
  
  <pre><code>_isIt = !_isIt;
  </code></pre>
  
  <p>It works, sure. It's readable, sure. But so is <code>i = i + 1</code>, still, we always write <code>i++</code>. Is there a neater way to toggle a <code>bool</code>?</p>