title: How to create bitmask in Swift
body: <p>In Objective C I was making </p>
  
  <pre><code>uint32_t myFirstMask = 0x1 &lt;&lt; 0;
  uint32_t mySecondMask = 0x1 &lt;&lt; 1;
  </code></pre>
  
  <p>the question is - how to implement that in Swift. </p>