The rules for naming fields, exposedFields, eventOuts and eventIns for the built-in nodes are as follows:
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All names containing multiple words start with a lower case letter and the first letter of all subsequent words are capitalized (e.g. bboxCenter), with the exception of get_ and _changed described below.
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All eventIns have the prefix set_ - with the exception of the addChildren and removeChildren eventIns.
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All eventOuts have the suffix _changed appended - with the exception of eventOuts of type SFBool. Boolean eventOuts begin with the word is (e.g. isFoo) for better readability.
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All eventIns and eventOuts of type SFTime do not use the set_ prefix or _changed suffix
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