@observe('source')
    def _update_proxy(self, change):
        # The superclass handler implementation is sufficient.
        super(Html, self)._update_proxy(change)
Creates a group tree structure and returns the names of the dataset and the lowest subgroup to hang the array on
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/widgets/html.py/Html._update_proxy--crossover with--dataset/ETHPy150Open ooici/pyon/prototype/hdf/hdf_codec.py/HDFEncoder.create_group_tree