ef="dart-io/SecureSocket-class.html">SecureSocket</a></span> <span class="parameter-name">combine</span>(<span class="parameter" id="combine-param-previous"><span class="type-annotation">T</span> <span class="parameter-name">previous</span>, </span> <span class="parameter" id="combine-param-element"><span class="type-annotation">T</span> <span class="parameter-name">element</span></span>)</span>)
            <span class="returntype parameter">&#8594; <a href="dart-async/Future-class.html">Future</a><span cl