p://boost-consulting.com/mplbook/preprocessor.html#sequences">sequence</a>) describing
the function's parameters in the order in which they'd be expected
if passed positionally.  Any required parameters must come first,
but the <tt class="docutils literal">(required … )</tt> clause can be omitted when all the
parameters are optional.</p>
<div class="section" id="required-parameters">
<h4>2.1.5.1&nbsp;&nbsp;&nbsp;Required Parameters</h4>
<div class="compound">
<p class="compound-first">Required parameters 