2" name="l00062"></a><span class="lineno">   62</span><span class="comment"> * @return `os`.</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="comment"> */</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>std::