def insert_after(self, after, item):
        index = self._items.index(after)
        self.insert(index + 1, item)
        return (index, item)
Initialize the layout for the underyling widget.
dataset/ETHPy150Open enthought/pyface/pyface/action/group.py/Group.insert_after--crossover with--dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/wx/wx_split_item.py/WxSplitItem.init_layout