code: def cdf(self, y, f, n):
          r
          return binom.cdf(y, n=n, p=expit(f))
docs: r"""
          Cumulative density function of the likelihood.
  
          Parameters
          ----------
          y: ndarray
              query quantiles, i.e.\  :math:`P(Y \leq y)`.
          f: ndarray
              latent function from the GLM prior (:math:`\mathbf{f} =
              \boldsymbol\Phi \mathbf{w}`)
          n: ndarray
              the total number of observations
  
          Returns
          -------
          cdf: ndarray
              Cumulative density function evaluated at y.