def find_first_child_named(self, parent, name):
        for node in parent.childNodes:
            if node.localName == name:
                return node
        return None
Sets the downloader for this PP.
dataset/ETHPy150Open openstack/rack/rack/api/wsgi.py/XMLDeserializer.find_first_child_named--crossover with--dataset/ETHPy150Open yasoob/youtube-dl-GUI/youtube_dl/postprocessor/common.py/PostProcessor.set_downloader