title: ItemSeparatorComponent - Call back for each row
body: <p>How do I make <code>ItemSeparatorComponent</code> prop of <code>FlatList</code> get called for each row, so that one can customize for each row. Something similar of what <a href="https://facebook.github.io/react-native/docs/listview.html#renderseparator" rel="noreferrer">renderSeparator</a> prop of deprecated <code>ListView</code>. </p>