title: Swift Editor Placeholder in source file
body: <p>hi have problem with the swift error "Swift Editor Placeholder In Source File"
  This is my code</p>
  
  <pre><code>public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -&gt; UICollectionViewCell{
  
      let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: &lt;#T##IndexPath#&gt;) as! CustomBrandCell
  
      let brandImage: UIImage = UIImage(named: self.brands[indexPath.row].name)!
  
      cell.brandImageView.image = brandImage
  
      return cell
  }
  </code></pre>