title: Is all code compiled and included on the final binary?
body: <p>Suppose I create a class extension with hundreds of methods and I include that class in my project.</p>
  <p>Now suppose that from that extension, I just use 2 or 3 methods. Remember that the class extension has hundreds of methods.</p>
  <p>When I compile the code, what will be included in the binary?</p>
  <p>Will it be just the methods I have used from that class extension or all of them, including the ones that were not used by that particular project?</p>