def add_comment(self, data):
        comment = self.__document.createComment(data)
        self._element.appendChild(comment)
Returns true for a multi-layer dict of FeatureCollections.
dataset/ETHPy150Open uwdata/termite-visualizations/web2py/gluon/contrib/pysimplesoap/simplexml.py/SimpleXMLElement.add_comment--crossover with--dataset/ETHPy150Open bkg/django-spillway/spillway/collections.py/has_layer