'Parse the HTTPResponse\'s body and fill all the data into a class of
return_type.'

@staticmethod
def parse_response(response, return_type):

    root = ETree.fromstring(response.body)
    xml_name = getattr(return_type, '_xml_name', return_type.__name__)
    if (root.tag == xml_name):
        return _ETreeXmlToObject._parse_response_body_from_xml_node(root, return_type)
    return None
