docs: def deriv(self, p):
          """
          Derivative of C-Log-Log transform link function
  
          Parameters
          ----------
          p : array-like
              Mean parameters
  
          Returns
          -------
          g'(p) : array
              The derivative of the CLogLog transform link function
  
          Notes
          -----
          g'(p) = - 1 / ((p-1)*log(1-p))
          """
          p = self._clean(p)
          return 1. / ((p - 1) * (np.log(1 - p)))