def _become_message(self, message):
        for name in ('_headers', '_unixfrom', '_payload', '_charset',
                     'preamble', 'epilogue', 'defects', '_default_type'):
            self.__dict__[name] = message.__dict__[name]
Assume the non-format-specific state of message.
dataset/ETHPy150Open babble/babble/include/jython/Lib/mailbox.py/Message._become_message