title: How can I have a View vertically fill the space of a ScrollView in react-native?
body: <p>I have:</p>
  
  <pre><code>            &lt;ScrollView style={{ position: 'absolute', top: 0, height: '100%', paddingTop: 250, left: 0, right: 0, marginBottom: -50, backgroundColor: 'red', flex: 1 }}&gt;
                  &lt;View style={{ backgroundColor: customTheme.colors.background, paddingHorizontal: 5 }}&gt;
                      &lt;Title&gt;{conversation?.title}&lt;/Title&gt;
                      {participants.length &gt; 0 &amp;&amp; &lt;List.Item
                          title={&lt;ParticipantAvatarRow participants={participants} /&gt;}
                          description={`${participants.length} people joining`}
                          left={props =&gt; &lt;FontAwesome {...props} style={{ marginVertical: 5 }} name='group' size={24} /&gt;}
                      /&gt;}
  </code></pre>
  
  <p>But the <code>View</code> doesn't fill the vertical space of <code>ScrollView</code>. I want it to be at least as much as <code>ScrollView</code>, but possibly more if the content stretches it.</p>