def child_added(self, child):
        super(QtWindow, self).child_added(child)
        if isinstance(child, QtContainer):
            self.widget.setCentralWidget(self.central_widget())
When paging through subdomain results, this will return the previous
dataset/ETHPy150Open nucleic/enaml/enaml/qt/qt_window.py/QtWindow.child_added--crossover with--dataset/ETHPy150Open rackspace/pyrax/pyrax/clouddns.py/CloudDNSManager.list_subdomains_previous_page