title: initWithDictionary: in Objective-C and Swift
body: <p>In Objective-C we can use object mapping with json response like this way</p>
  
  <pre><code> PolicyData *policyData = [[PolicyData alloc] initWithDictionary:responseObject error:&amp;err];
  </code></pre>
  
  <p>Here we can map responseObject with PolicyData class properties.
  How i can do the same in Swift? </p>