="class in com.facebook.rendercore">MountItem</a>&nbsp;item,
                              int&nbsp;oldIndex,
                              int&nbsp;newIndex)</pre>
<div class="block">Moves the MountItem associated to oldIndex in the newIndex position. This happens when a
 RootHostView needs to re-arrange the internal order of its items. If an item is already present
 in newIndex the item is guaranteed to be either unmounted or moved to a different index by
 subsequent calls to either <a href="../../../com/