A horizontal or vertical separator line. The visual appearance of this
separator can be controlled via CSS. A horizontal separator occupies the
full horizontal space allocated to it (less padding), and a vertical
separator occupies the full vertical space allocated to it (less padding).
valignment properties determine how the
separator is positioned in the other dimension, for example, how a horizontal
separator is positioned vertically within its allocated space.
The separator is horizontal (i.e.
isVertical() == false) by default.
The style-class for this control is "separator".
The separator provides two pseudo-classes "horizontal" and "vertical" which are mutually exclusive. The "horizontal" pseudo-class applies if the separator is horizontal, and the "vertical" pseudo-class applies if the separator is vertical.
Separator sets focusTraversable to false.