convert ColorsChooser to Java 7's generic JComboBox
convert to Java 7's generic JComboBox
replace raw type with generics
replace GenericJComboBox with Java 7's generic JComboBox
replace GenericJComboBox with Java 7's generic JComboBox
replace GenericJComboBox with Java 7's generic JComboBox
remove third party GenericJComboBox
remove raw type Class
replace raw type Class with Class<?>
replace cast with asSubclass
store the actual generator object instead of if its class