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class FeatureVariablesBase:
    """
    Abstract base class for feature variables
    """

    def create_or_retrieve_features(self):
        """

        :return: a list of variable names to use for Fraud Detector. e.g. ["name", "address"]
        """
        raise NotImplementedError

    def create_or_retrieve_label(self):
        """

        :return: Label variable name and a map of fraud vs legit flag. e.g {"LEGIT" :[0], "FRAUD" :[1] }

        """
        raise NotImplementedError