@Override
	public String toString() {
		return "Population size: " + _populationSize + "\n" +
			"Tournament size: " + _tournamentSize + "\n" +
			"Mutation rate: " + _mutationRate + "\n" +
			"Mutation multitude: " + _mutationMultitude + "\n" +
			"Polygon length: " + _polygonLength + "\n" +
			"Polygon count: " + _polygonCount + "\n" +
			"Reference image size: " + _referenceImageSize.width +
				"x" + _referenceImageSize.height;
	}
Collects the configurable GA engine parameters.
jenetics.example/src/main/java/io/jenetics/example/image/EngineParam.java