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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 serialize_model(self, model, field_dict=None):
 """ Takes a model and serializes the fields provided into a dictionary. :param Model model: The Sqlalchemy model instance to serialize :param dict field_dict: The dictionary of fields to return. :return: The serialized model. :rtype: dict """

        response = self._serialize_model_helper(model, field_dict=field_dict)
        return make_json_safe(response)