Wraps http://docs.oracle.com/javase/8/javafx/api/javafx/scene/input/KeyCombination.ModifierValue.html
Modifier which specifies that the alt key can be either up or down.
Modifier which specifies that the alt key must be down.
Modifier which specifies that the control key can be either up or down.
Modifier which specifies that the control key must be down.
Modifier which specifies that the meta key can be either up or down.
Modifier which specifies that the meta key must be down.
Modifier which specifies that the shift key can be either up or down.
Modifier which specifies that the shift key must be down.
Modifier which specifies that the shortcut key can be either up or down.
Modifier which specifies that the shortcut key must be down.
Constructs a new KeyCombination from the specified string.
Constructs a new KeyCombination from the specified string.