def assemble(self):
        return self.assemble_children()
Add the proper columns for a polymorphic table.
dataset/ETHPy150Open nucleic/enaml/enaml/workbench/ui/menu_helper.py/RootMenuNode.assemble--crossover with--dataset/ETHPy150Open sdispater/orator/orator/schema/blueprint.py/Blueprint.morphs