Returns
        -------
        prior_prior_model_name_dict: {Prior: str}
            A dictionary mapping priors to the names of associated prior models. Each prior will only have one prior
            model name; if a prior is shared by two prior models then one of those prior model's names will be in this
            dictionary.

def constant_prior_model_name_dict(self):
        """
        Returns
        -------
        prior_prior_model_name_dict: {Prior: str}
            A dictionary mapping priors to the names of associated prior models. Each prior will only have one prior
            model name; if a prior is shared by two prior models then one of those prior model's names will be in this
            dictionary.
        """
        return {constant_tuple.constant: prior_model_tuple.name
                for prior_model_tuple in self.prior_model_tuples
                for constant_tuple in prior_model_tuple.prior_model.constant_tuples}