title: How to get Objective C class by passing Swift calls to Objective C function
body: <p>I have library developed in Objective C. In that library, one of my property expects the registration of my class. So that it will call the pre-defined method on that class. (Some what like delegate).</p>
  
  <p>Below is my objective C property and how I set in swift class:</p>
  
  <pre><code>Builder.registerMapperClass(KeyMapper().self)
  </code></pre>
  
  <p>For now, I have passed <code>KeyMapper().self</code>, but this is not working. I also tried <code>KeyMapper()</code>. Because in Objective C, it is throwing error as below</p>
  
  <pre><code>-[PROJECTNAME.KeyMapper mapPropertyForKey:ForClass:]: unrecognized selector sent to instance 0x7f9911f22c60"
  </code></pre>
  
  <p>Here, PROJECTNAME is appended before the class name. Now, since this method will be called on Class which is not present with name <code>PROJECTNAME.KeyMapper</code> but <code>KeyMapper</code>.</p>
  
  <p>So how to solve this issue?</p>