refreshFast
fun refreshFast(treeView: TreeView<T>? = null, children: Collection<out TreeItem<T>>, preserveSelection: Boolean = true)
fun refreshFast(treeView: TreeView<T>? = null, children: Collection<out TreeItem<T>>, structureComparator: Comparator<TreeItem<T>>, recursive: Boolean = false, preserveSelection: Boolean = true)