code: def get_mean_and_stddevs(self, sites, rup, dists, imt, stddev_types):
          
          C = self.COEFFS[imt]
          mean = (np.log(self.get_magnitude_term(C, rup) +
                         self.get_distance_term(C, dists.rrup)) +
                  self.get_site_amplification(C, sites))
          stddevs = self.get_stddevs(C, sites.vs30.shape, rup.mag, stddev_types)
          return mean, stddevs
docs: See :meth:`superclass method
          <.base.GroundShakingIntensityModel.get_mean_and_stddevs>`
          for spec of input and result values.