Can anyone of you point out the one class that really get on my nerves here

QAbstractFormBuilder
QAbstractExtensionManager
QAbstractExtensionFactory
QAbstractPrintDialog
QAbstractItemView
QAbstractPageSetupDialog
QAbstractSlider
QAbstractGraphicsShapeItem
QAbstractUndoItem
QAbstractProxyModel
QAbstractScrollArea
QAbstractItemDelegate
QAbstractSpinBox
QAbstractButton
QAbstractTextDocumentLayout
QAbstractNetworkCache
QAbstractSocket
QDBusAbstractAdaptor
QAbstractTableModel
QAbstractFileEngineHandler
QAbstractFileEngine
QAbstractFileEngineIterator
QAbstractItemModel
QAbstractEventDispatcher
QAbstractListModel
QAbstractXmlReceiver
QAbstractMessageHandler
QAbstractUriResolver
QAbstractXmlNodeModel