Send a boolean as an Action parameter in Caliburn Micro

This is my XAML View (some code omitted for readability):

<Window ... xmlns:c="http://www.caliburnproject.org">
  <Button Content="Close without saving" c:Message.Attach="Close(false)" />
  <Button Content="Save and Close" c:Message.Attach="Close(true)" />
</Window>

public void Close(bool save) 
{
  if (save) 
  { 
    // save the data 
  }
  TryClose();
}