def translate_args(self, mu, k_agg, return_p=False):
        """%(super)s

        The keyword argument return_p computes the p values used to define the
        the truncated negative binomial
        """
        if return_p:
            return nbinom_ztrunc_p(mu, k_agg), k_agg
        else:
            return mu, k_agg
%(super)s

        The keyword argument return_p computes the p values used to define the
        the truncated negative binomial