ctual </span><span class="token keyword">fun </span><a href="left-outer-join.html"><span class="token function">leftOuterJoin</span></a><span class="token punctuation">(</span><span class="parameters "><span class="parameter ">datasource<span class="token operator">: </span><a href="../../-data-source/index.html">DataSource</a></span></span><span class="token punctuation">)</span><span class="token operator">: </span><a href="../-on/index.html">Join.On</a><span class="clearfix"><span class="floating-right">