title: Deprecating renamed method with multiple arguments
body: <p>I wanted to update the naming of the following method for Swift 3:</p>
  
  <pre><code>public func imageWithUrl(url: String, placeholderNamed: String) {
      if let image = UIImage(named: placeholderNamed) {
          imageWithUrl(url: url, placeholder: image)
      } else {
          imageWithUrl(url: url)
      }
  }
  </code></pre>
  
  <p>to </p>
  
  <pre><code>public func image(url: String, placeholderNamed: String) {
  </code></pre>
  
  <p>So I deprecated the old method with this:</p>
  
  <pre><code>@available(*, deprecated: 1.8, renamed: "image(url:, placeholder:")
  </code></pre>
  
  <p>The problem is that I'm getting the following error:</p>
  
  <blockquote>
    <p>'renamed' argument of 'available' attribute must be an operator, identifier, or full function name, optionally prexied by a type name</p>
  </blockquote>