Run /toys/Hello/src/main/java/a11y/HelloSimpleTableView.java
Hit the tab key till the focus reaches the table,
Hit arrow up and arrow down moves the selection within the table.
Works fine.

Now turn cell selection on (fire the first button) and repeat the same steps.
When the focus gets to the table nothing is selected and arrow keys do nothing.
One should be able to select the table cells without using the mouse. In HelloSimpleTableView.java I don't see that being possible.