<div class="block">Return non-matching headers from this envelope as an Enumeration
 of Header objects.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSize()">getSize</a></span>()</code></th>
<td class="colLast">
<div class="block">Return the size of the content of this part in bytes.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th