code: @Override
     public String getActions()
     {
        if (this.httpMethodsString != null)
          return this.httpMethodsString;
        else if (this.httpExceptionString != null)
          return "!" + this.httpExceptionString;
        return null;
     }
docs: <p>
  Returns a canonical String representation of the actions of this WebResourcePermission. WebResourcePermission
  actions are canonicalized by sorting the HTTP methods into ascending lexical order. There may be no duplicate HTTP
  methods in the canonical form, and the canonical form of the set of all HTTP methods is the value null.
  </p>
  
  @return a String containing the canonicalized actions of this WebResourcePermission (or the null value).