title: Scala method call parameters with colon
body: <pre><code>final def apply(block: =&gt; Result): Action[AnyContent] =
      apply(BodyParsers.utils.ignore(AnyContentAsEmpty: AnyContent))(_ =&gt; block)
  </code></pre>
  
  <p>Does Anybody know what does this <code>AnyContentAsEmpty: AnyContent</code> mean ? Particularly <code>: AnyContent</code> ?</p>