I attach a test here, 3 listeners are added to the treeView: InvalidationListener, ListChangeListener and EventHandler<CLICKED>

1) run the test
2) select child-1-0
3) click on the open/close arrow of child-1 to close the child-1
    Here are the listener traces:
             ---jsl-InvalidationListener observable=[TreeItem [ value: child-1 ], TreeItem [ value: child-2 ]]
             ---jsl-InvalidationListener getSelectedItems=[TreeItem [ value: child-1 ], TreeItem [ value: child-2 ]]
             ---jsl-ListChangeListener getSelectedItems=[TreeItem [ value: child-1 ], TreeItem [ value: child-2 ]]
             ---jsl-ListChangeListener c.getList()[TreeItem [ value: child-1 ], TreeItem [ value: child-2 ]]
    Question1:
             why child-2 is in the selection list? but frome the stage the child-2 does not have the selection color
     Question2:
             I called
                    treeView1.getSelectionModel().getSelectedItems()
             in both InvalidationListener and ListChangeListener and got the same results, is it right?
4) click on any key to print out the current selection:
             ---jsl-EventHandler [TreeItem [ value: child-1 ]]
    now the selection list is correct.