def cannot_convert(self, node, reason=None):
        lineno = node.get_lineno()
        for_output = node.clone()
        for_output.prefix = u""
        msg = "Line %d: could not convert: %s"
        self.log_message(msg % (lineno, for_output))
        if reason:
            self.log_message(reason)
'deserialized_basename' streams Document.file with custom basename.
dataset/ETHPy150Open ctxis/canape/CANAPE.Scripting/Lib/lib2to3/fixer_base.py/BaseFix.cannot_convert--crossover with--dataset/ETHPy150Open benoitbryon/django-downloadview/demo/demoproject/object/tests.py/DeserializedBasenameTestCase.test_download_response