ffset of span</dd>
</dl>
<h2 id="returns">Returns</h2>
<p>size of gap</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">@support_annotation_or_set
def gap(self, start: int, end: int):
    &#34;&#34;&#34;
    Return the gep between this span and the other span. This is the distance between
    the last character of the first span and the first character of the second span in
    sequence, so it is always independent of the order of the two span.