Defines a set of conditional (optional) features. These features
may not be available on all platforms. An application that wants to
know whether a particular feature is available may query this using
the javafx.application.Platform.isSupported(javafx.application.ConditionalFeature) function. Using a conditional feature
on a platform that does not support it will not cause an exception. In
general, the conditional feature will just be ignored. See the documentation
for each feature for more detail.
extends