YOOtheme Pro [WordPress] & WidgetKit Bundle

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I see that Yootheme Pro have elements similar to some in Widgekit. My question is if it really a good idea to install Widetkit in Yootheme Pro or it’s suposed to not be needed, because or the functions already incorporated into Yootheme Pro. What could be the advantage of using Widgetkit inside Yootheme Pro at this very moment?

v4.5.20 – v3.1.31