def add_tools(self, name, *args):
        # Take stretch out
        stretch = self._left.children()[-1]
        stretch.parent(None)
        
        # Add group of widgets
        panel = GroupWidget(title=name, parent=self._left, flex=0)
        vbox = VBox(parent=panel)
        for widget in args:
            widget.parent(vbox)
        
        # Put stretch back in
        stretch.parent(self._left)
Add a set of widgets and collect them in a "tool" GroupWidget by
dataset/ETHPy150Open zoofIO/flexx/flexx/ui/_plotlayout.py/PlotLayout.add_tools