title: Dynamic forwarding: suppress Incomplete Implementation warning
body: <p>I have a class exposing some methods, whose implementation is provided by an inner object.</p>
  
  <p>I'm using forward invocation to dispatch at runtime the method calls to the inner object, but XCode is complaining since it cannot find an implementation of the declared methods.</p>
  
  <p>I found some other similar questions on SO, but all of them were solved with a design change.</p>
  
  <p>I don't mean to have a discussion about the design here, but if anybody has some suggestion about it I have an <a href="https://codereview.stackexchange.com/questions/20749/code-review-of-forward-invocation">open question</a> on Code Review, which is more suitable for such kind of discussions.</p>
  
  <p>My question is here is whether a method to turn off the <code>Incomplete Implementation</code> warning in XCode exists.</p>