lass="parameters "><span class="parameter ">expression<span class="token operator">: </span><a href="-expression/index.html">Expression</a><span class="token operator">&lt;</span><a href="any-from.html">T</a><span class="token operator">&gt;</span></span></span><span class="token punctuation">)</span><span class="token operator">: </span><a href="-op/index.html">Op</a><span class="token operator">&lt;</span><a href="any-from.html">E</a><span class="token operator">&gt;</span></div><p class="paragraph">Retur