code: def get_mean_and_stddevs(self, sctx, rctx, dctx, imt, stddev_types):
          
          return self.kwargs[str(imt)].get_mean_and_stddevs(
              sctx, rctx, dctx, imt, stddev_types)
docs: Call the get mean and stddevs of the GMPE for the respective IMT