ss="blockList">
<li class="blockList">
<h4>_header</h4>
<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> _header</pre>
<div class="block">Optional header to prepend before any other output: typically a
 comment section or so. Note that contents here are
 <b>NOT modified in any way</b>, meaning that any comment indicators
 (leading '#' or '!') and linefeeds MUST be specified by caller.</div>
</li>