#39;</span><span class="p">:</span>
<span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        Shift the entire time range forward by a specified duration.</span>

<span class="sd">        :param delta: The duration by which to shift the time range. If not provided, the entire duration of the time range is used.</span>
<span class="sd">        :type delta: TimeDelta or None</span>
<span class="sd">        :return: The instance with the updated time range.</span>
<span