class PoissonDistribution extends AbstractIntegerDistribution {

    public double getMean() {
        return mean;
    }

    public  PoissonDistribution(double p);
    public  PoissonDistribution(double p, double epsilon, int maxIterations);
    public  PoissonDistribution(RandomGenerator rng,
                               double p,
                               double epsilon,
                               int maxIterations);
    public  PoissonDistribution(double p, double epsilon);
    public  PoissonDistribution(double p, int maxIterations);

}