e="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;getHeaderNames()</pre>
<div class="block">The default behaviour of this method is to call <a href="HttpServletResponse.html#getHeaderNames()"><code>HttpServletResponse.getHeaderNames()</code></a> on the wrapped response
 object.

 <p>
 Any changes to the returned <code>Collection</code> must not affect this <code>HttpServletResponseWrapper</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code