Run the attached FXML file. The following exception is produced:

Feb 01, 2012 12:22:56 PM javafx.fxml.JavaFXBuilder$ObjectBuilder put
WARNING: Method styleClass failed
java.lang.IllegalArgumentException: Unable to coerce toto to interface java.util.Collection.
at com.sun.javafx.fxml.BeanAdapter.coerce(BeanAdapter.java:725)
at javafx.fxml.JavaFXBuilder$ObjectBuilder.put(JavaFXBuilderFactory.java:283)
at javafx.fxml.JavaFXBuilder$ObjectBuilder.put(JavaFXBuilderFactory.java:180)
at javafx.fxml.FXMLLoader$Element.applyProperty(FXMLLoader.java:449)
at javafx.fxml.FXMLLoader$Element.processPropertyAttribute(FXMLLoader.java:437)
at javafx.fxml.FXMLLoader$Element.processInstancePropertyAttributes(FXMLLoader.java:181)
at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:566)
at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2068)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:1949)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:1866)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2417)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2403)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2397)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2392)
at com.fxexperience.random.lumen.StyleClassBuilder.start(StyleClassBuilder.java:17)
at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:317)
at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:174)
at com.sun.javafx.application.PlatformImpl$3.run(PlatformImpl.java:141)