def set_class_on_child(self, node, class_, index=0):
        children = [n for n in node if not isinstance(n, nodes.Invisible)]
        try:
            child = children[index]
        except IndexError:
            return
        child['classes'].append(class_)
Override this method so that it *creates* the tvtk
dataset/ETHPy150Open zackw/header-survey/sphinx/ext/html5_output.py/BaseTranslator.set_class_on_child--crossover with--dataset/ETHPy150Open enthought/mayavi/mayavi/modules/glyph.py/Glyph.setup_pipeline