Javadoc
Returns an observable which delays notification of value change events
from observable
until delay
milliseconds have
passed since the last change event, or until a FocusOut event is received
from the underlying viewer control (whichever happens earlier). This
class helps to delay validation until the user stops changing the value
(e.g. until a user stops changing a viewer selection). To notify about
pending changes, the returned observable value will fire a stale event
when the wrapped observable value fires a change event, but this change
is being delayed.