span class="lineno">   58</span>    }</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span> </div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>    MUDA_GENERIC <span class="keywordtype">bool</span> valid()<span class="keyword"> const</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span><span class="keyword">    </span>{</div>
<div class="line"><a id="l00062" name="l00062"></a><span class=