def append(self, obj):
        if obj is not None:
            obj._parent = self
            self._children.append(obj)
TODO: add docstring
dataset/ETHPy150Open kdart/pycopia/XML/pycopia/XML/POM.py/ElementNode.append--crossover with--dataset/ETHPy150Open treasure-data/td-client-python/tdclient/job_api.py/JobAPI.job_result