How to disable some items of javaFX ComboBox?

How to disable some items of javaFX ComboBox?

References

Reference NO 1

http://stackoverflow.com/questions/13587134/how-to-disable-some-items-of-javafx-combobox

Reference NO 2

http://stackoverflow.com/questions/13131781/combobox-selection-not-reset-to-top-of-dropdown-list-items-in-javafx-2-2

Reference NO 3

http://docs.oracle.com/javafx/2/ui_controls/combo-box.htm

Reference NO 4

http://docs.oracle.com/javafx/2/api/javafx/scene/control/ComboBox.ComboBoxSelectionModel.html

Reference NO 5

http://fxexperience.com/2012/03/new-in-javafx-2-1-combobox/

Reference NO 6

http://jojorabbitjavafxblog.wordpress.com/2011/06/23/javafx-2-0-custom-combobox/

Reference NO 7

http://www.java2s.com/Code/Java/JavaFX/customcellfactory.htm

Reference NO 8

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