The following Styleable classes are used in controls development. We should consider whether we make them available as public API as part of the RT-21596 effort.

   * com.sun.javafx.css.StyleableProperty
   * com.sun.javafx.css.StyleableBooleanProperty
   * com.sun.javafx.css.StyleableDoubleProperty
   * com.sun.javafx.css.StyleableFloatProperty
   * com.sun.javafx.css.StyleableIntegerProperty
   * com.sun.javafx.css.StyleableLongProperty
   * com.sun.javafx.css.StyleableObjectProperty
   * com.sun.javafx.css.StyleableStringProperty

On a related note, in classes where we use these classes, can we perhaps simplify the need to gather them in the StyleableProperties static class in most skins? Perhaps we can look into options such as annotations, etc to simplify this process (and write less boilerplate).