elf</span><span class="o">.</span><span class="n">_stream_lock</span><span class="p">:</span>
            <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">stream</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_streams</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
                <span class="k">try</span><span class="p">:</span>
                    <span class="n">stream</