title: Get class name from a module
body: <p>How I can get from a module the Class name of the class the module is included ?</p>
  
  <pre><code>module ActMethods
    def some_method(*attr_names)
      cls = self.class # this doesn't work 
    end
  end
  </code></pre>
  
  <p>How I can get into the cls variable the name of the class to with this module is loaded ?</p>