title: Swift: Use of undeclared type
body: <p>I'm implementing a class but I'm getting this error: </p>
  
  <blockquote>
    <p>Use of undeclared type 'myProtocol'</p>
  </blockquote>
  
  <p>Here is my code:</p>
  
  <pre><code>class LocalContactService: myProtocol{
  </code></pre>
  
  <p>Any of you knows why I'm getting this error?</p>