Creates a new separator item.
        
        :return     <QTreeWidgetItem>

def createSeparatorItem( self ):
        """
        Creates a new separator item.
        
        :return     <QTreeWidgetItem>
        """
        item = QTreeWidgetItem(['                                    '])
        font = item.font(0)
        font.setStrikeOut(True)
        item.setFont(0, font)
        item.setData(0, Qt.UserRole, wrapVariant('separator'))
        flags = item.flags()
        flags ^= Qt.ItemIsDropEnabled
        item.setFlags(flags)
        
        return item