title: `%_` and detecting unwanted named arguments to a method
body: <p>As I understand, a named argument to a method goes to <code>%_</code> if not found in the signature (not sure why!). To detect this, I do</p>
  <pre><code>die &quot;Extra args passed&quot; if %_;
  </code></pre>
  <p>for the methods I remember to do and that are worth doing. Is there a way to automate this for example with some decorator kind of thing? Or I miss and <code>%_</code> is actually a very useful thing in object oriented Raku programming?</p>