title: Ruby: add method to the existing module
body: <p>There is a module:</p>
  
  <pre><code>module ActionDispatch
    module Routing
    end
  end
  </code></pre>
  
  <p>And methods:</p>
  
  <pre><code>def add_movie_path
  end
  
  def edit_movie_path
  end
  </code></pre>
  
  <p>How I can add to module <strong>Routing</strong> this methods?</p>
  
  <p>Is <a href="http://www.ruby-doc.org/core-2.0/Module.html#method-i-module_exec" rel="nofollow">this</a> only way?</p>