KDDockWidgets API Documentation  1.2.1
Deprecated List
Member KDDockWidgets::DockWidgetBase::setAffinityName (const QString &name)
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

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KDDockWidgets
Advanced Dock Widget Framework for Qt
https://www.kdab.com/development-resources/qt-tools/kddockwidgets/