title: iOS use type from main module inside Widget Extension
body: <p>Lets say i have a type in my main app target :</p>
  <pre><code>public struct Test {
     public init() {}
  }
  </code></pre>
  <p>I create a widget extension. When i try to <code>import MainTarget</code> / create a <code>Test()</code> I get &quot;No such module 'MainTarget'&quot;</p>