def child_added(self, child):
        super(QtScrollArea, self).child_added(child)
        if isinstance(child, QtContainer):
            self.widget.setWidget(self.scroll_widget())
Validate an update document.
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/qt/qt_scroll_area.py/QtScrollArea.child_added--crossover with--dataset/ETHPy150Open mongodb/mongo-python-driver/pymongo/common.py/validate_ok_for_update