code: func (prng ParetoGenerator) Pareto(alpha float64) float64 {
  	if !(alpha > 0.0) {
  		panic(fmt.Sprintf("Invalid parameter alpha: %.2f", alpha))
  	}
  
  	return prng.pareto(alpha)
  }
docs: // Pareto returns a random number of type I pareto distribution (alpha > 0,0)