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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_typedef(self, typedef_name, unused=None, with_defaults=True):
 """returns string, that contains valid C++ code, that defines typedef to function type :param name: the desired name of typedef """


        return free_function_type_t.TYPEDEF_NAME_TEMPLATE % {
            'typedef_name': typedef_name,
            'return_type': self.return_type.build_decl_string(with_defaults),
            'arguments': ','.join(
                [_f(x, with_defaults) for x in self.arguments_types])}