ion.</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 class="sd">        :rtype: self</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="n">delta</span> <span class="o">=</span> <span class="n">delta</span> <span cla