Note:
In ActionScript 2 have type "Void" but ActionScript 3 is "void" (I think this note affect to other case sensitive languages)
EA on default use variable type "void". If you choose type in "type" combobox you can choose only "Void" type and if you open this combo box and don't choose other type, type "void" automatically changed on "Void"

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It's not big problem but if you cenerate code you need check it or on desing stage you need every time control this type.