title: Doxygen @param direction arguments [in],[out],[in,out] example output
body: <p>The optional direction argument for the <code>@param</code> command is documented <a href="http://www.doxygen.nl/manual/commands.html#cmdparam" rel="noreferrer">here</a> as one of the following:</p>
  
  <pre><code>@param[in]
  @param[out]
  @param[in,out]
  </code></pre>
  
  <p>I do not see in any of the <a href="http://www.doxygen.nl/results.html" rel="noreferrer">example sites</a> how this information appears in the output. Is there an example of how this information should appear in the output?</p>