public Factory<Genotype<G>> genotypeFactory() {
		return _genotypeFactory;
	}
Return the used genotype {@link Factory} of the GA. The genotype factory
is used for creating the initial population and new, random individuals
when needed (as replacement for invalid and/or died genotypes).

@return the used genotype {@link Factory} of the GA.
jenetics/src/main/java/io/jenetics/engine/Engine.java