#NEWLINE# def __init__( self , fields , envelope = None ) : #NEWLINE# #INDENT# '\n        :param fields: a dict of whose keys will make up the final\n                       serialized response output\n        :param envelope: optional key that will be used to envelop the serialized\n                         response\n        ' #NEWLINE# self . fields = self #NEWLINE# self . envelope = envelope