title: Default parameter specifiers are not permitted
body: <p>I have the following code that gives the error </p>
  
  <blockquote>
    <p>Default parameter specifiers are not permitted</p>
  </blockquote>
  
  <p>How can this be fixed?</p>
  
  
  
  <pre><code>bool listSubscribe(string apikey,
                     string id, 
                     string email_address,
                     string [] merge_vars,
                     string email_type="html",
                     bool double_optin=false,
                     bool replace_interests=true,
                     bool send_welcome=false);
  
  bool listUnsubscribe(string apikey, 
                       string id, 
                       string email_address, 
                       bool delete_menber=false,
                       bool send_goodbye=true,
                       bool send_notify=true);
  </code></pre>