def _rgevolve_leadinglog(self, scale_out):
        """Compute the leading logarithmic approximation to the solution
        of the SMEFT RGEs from the initial scale to `scale_out`.
        Returns a dictionary with parameters and Wilson coefficients.
        Much faster but less precise that `rgevolve`.
        """
        self._check_initial()
        return rge.smeft_evolve_leadinglog(C_in=self.C_in,
                            scale_in=self.scale_in,
                            scale_out=scale_out)