ass="string">"%field1"</span><br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;(&nbsp;@&nbsp;)&nbsp;:&nbsp;<span class="keywordsign">'</span>a&nbsp;list&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;list&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;list<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;in_channel<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;out_channel<br>
&nbsp;&nbsp;<span class="ke